B2B Electronics

Electric drop Bolt is called electric drop down bolt, drop bolts lock, electric bolt lock. It is usually installed to control the glass doors/gates. Electric drop bolt locks can be used with any kind of electronic digital on/off switches, magnetic stripe card reader, proximity card reader and biological access control system.

Drop bolt is made up of 2 parts-the face plate and body. Additionally there is a strike plate.

The face plate is usually made of aluminum and body made of stainless steel.

Sensor Type – Generally there are 2 types sensor electric drop bolt in the market. Ball bearing sensor and magnetic sensor.

Working mode – There are 2 types working mode drop bolts, the failsafe and failsecure modes. Failsafe mode drop bolt is widely used nowadays due to when the power cut offer the drop bolt latch is unlocking. It ensures the people escape.

The failsecure drop bolt is used only in the high security place such as prisons which do not allow access if no valid command, regardless of any reasons.

Delay – Some drop bolts have delay function buy some not. The delay function is helpful to keep the door close properly every time when people push/pull the door and leave it closing by floor spring. The delay function provides the drop bolts ability that relock only when the door do not swing anymore. This is very useful to the door that floor spring works not well enough. It avoids the door impact the bolt latch by mistake. The user could adjust the delay time from 3/6/9 seconds as needs.

Cables – There are different quantity cables drop bolt in market. The different cable quantity drop bolts have different performance. 2-cable drop bolt is a basic level product which provides the basic function. When power on, the current drive the circle to generate electromagnetic effect, which attracts the spring sheet to keep locking. It is easy heat for a long term using. And the current fluctuate may easily causes malfunction to drop bolt.

Multi cables drop bolt provide more features such as door contact, REX, etc. A unique logic circuit keeps the drop-bolt retracted until the door has been closed and is properly aligned to assure engagement of the lock bolt.

Pongee Industries Co., Ltd is a Taiwan local company of specializing in electric locks. They provide electric deadbolt, electric drop bolt with various sizes to meet different demands of clients. Learn more details about electric deadbolts, RFID modules, UHF RFID readers etc., welcome to send inquiry or contact Pongee directly!

Article Source: http://www.eurohotelocks.com/?p=1511

The purpose of the reverse osmosis booster pump is to increase water pressure going into the RO unit.

Reverse osmosis is a pressure-driven process. Small residential RO units will theoretically operate on very low pressure–down to 35 psi, according to some membrane makers–but the reality is, you won’t get a lot of water and the product water quality will be compromised if the unit runs below 45 psi. Low inlet pressure makes the unit produce more reject water, produce less drinking water, fill the storage tank more slowly, and produce lower quality water.

RO units run well on typical city water pressure of 60 psi, but they run even better with a small pump to boost the pressure to 80 psi or higher.

Do You Need a Booster Pump?

Most city water reverse osmosis users have enough city water pressure to run their RO unit nicely and they do not need a booster pump. For example, if your city water pressure is 60 psi or more, there is little to be gained by adding a RO pump. If your pressure is 50 psi or less, however, a pressure boost pump will give your RO unit more zip. You’ll have more water, at a higher pressure, in the storage tank, and the tank will fill faster. The increased pressure will also improve the economy of the unit (it will run less reject water to drain) as well as the quality of the water. RO units thrive on pressure.

Triwin Watertec Co., Ltd. is one of outstanding RO pump manufacturer in Taiwan. If you are interested in learning further details about RO Diaphragm Booster Pump or other products, welcome to check out Triwin Watertec: https://www.triwinwater.com

Article Source: http://www.purewateroccasional.net/hwroboosterpump.html

Modern living has become highly sophisticated and a lot of pressing concerns can cause elevated stress and physical breakdown. Good thing water dispensers came into the consumer world to help alleviate the high demands on time and energy.

A wide array of under sink water chiller and hot water dispenser brands is available and each comes with a price tag that suits every budget. Exciting designs and features will surely dazzle even the most meticulous customer.

The following sections discuss two types of water dispensing machines that are great value for money. The first one is able to provide sparklingly chilled water as really delightful refreshment. The second one produces boiling hot water needed to make coffee, tea and other hot drinks.

Under Sink Water Chillers

These water dispensing machines eliminate the cost and hassle of spending precious time going to the supermarket whenever bottled water has run out. They are equipped with a technologically advanced in line filtration system that can adequately provide a consistent source of chilled and filtered water. The water tastes absolutely great and it does not have the odors oftentimes associated with a mains water supply.

The under sink or under counter water chillers are cost effective as well as environmentally friendly. They are directly connected to the mains water supply and the water passes through the in line filtration system. Organic chemicals and undesirable tastes and odors are effectively removed. The filtration process then yields crystal clear and fresh tasting water that is dispensed via the available tap of the machine.

There are other essential features that every consumer must watch out for. It is best that the dispensers are built of stainless steel for durability while the coating is ideally of scratch and impact resistant plastic.

The refrigeration system must be efficient and silent if possible. With a static condenser, the operation will be incredibly great, providing considerable energy savings.

The sealed ice bank of the cooling system must be ensured at all times. Doing so will retain the hygienic levels of the dispensed water. There will then be a continual supply of ice cold water that is free from bacteria obtained from external sources. Also, the need for regular sanitization is reduced.

The maintenance of the units is very easy and economical for the filter change and sanitization are done once every 6 months. The product supplier has replacement filters and sanitization kits readily available to prevent any hitch in the use of the machine.

The most important thing to consider is that the dispensers bear the CE mark to ascertain that they have passed the European standards for product safety and usability.

Hot Water Dispensers

These appliances dispense water at near boiling point or at about 94 degrees Centigrade. They are commonly known as boiling water taps. They are available in two models such as hot only, and hot and cold water types. They are kettle like product items that boil and dispense single mugful of water.

They normally have variable settings in the quantity of water being dispensed. A few seconds is all it takes to dispense water via the hot water dispensers. This means potential energy saving benefits can be acquired because only the necessary amount of water is boiled.

The other types of hot water dispensing machines include boil on demand heaters, tank dispensers and thermo pot water dispensers. The boil on demand types of heaters is small, portable and cheap. It does not need installation and is an energy saver.

The hot water tank type of dispensers needs to be plumbed directly to the water supply. The water is then heated and dispensed via the faucet. It has a built in filter and thermostat.

The thermo pot type of hot water dispensers combines the features of an electric kettle and a hot water flask. It is potable and requires no installation.

Water dispensers have innovative designs and awesome features to choose from. Remarkably, they possess both beauty and functionally that make modern life less stressful.

There is a choice between countertop and under sink water chiller models, depending on individual preferences. Also, various hot water dispenser brands are also being offered and they serve as great alternatives for the traditional way of boiling water using a kettle.

Triwin Watertec, a Taiwan-based water dispenser supplier, is committed to design, manufacture and export high quality POU water dispensers/coolers since our establishment in 1984. If you are interested in learning more information about water dispensers, welcome to contact with Triwin Watertec.

Article Source: http://EzineArticles.com/7194541

Whether you’re looking to purchase a new treadmill or looking to update an existing one, knowing about which kind of motor to look for is vital to the success of your treadmill use. The motor is the main hub and carries the most weight mechanically. They vary in their abilities and capacities and are not all alike. It is essential to consider a few different variables with its motor before you make your treadmill purchase. This will ensure that you will bring the right treadmill home that is best-suited for your lifestyle and fitness goals.

Aside from the user, the motor does the most work in the treadmill. It is imperative that quality be assessed for long-term use, especially for more serious treadmill users. Poor quality motors are likely to overheat and require unnecessary repairs. The best way to check if your motor is a good quality motor is by checking the manufacturer warranty. A high-quality motor will have a longer warranty period and is a safer investment. In almost all of our treadmill reviews, we help you by giving the horsepower of the motor and by using the information below can determine if it is best suited for what you would use it for. One company that is known for high quality treadmill motors are Sole treadmills. They deliver a great product and stand behind it.

When it comes down to the nuts and bolts of the matter, treadmill motors are not wholly difficult to understand. Treadmill motor energy is measured in horsepower (HP) and can be sorted into three different rating systems:

1. Peak Duty:

Generally the weakest. “Peak” stands for the peak horsepower that the treadmill will reach and no more.

2. Treadmill Duty:

In-between peak and continuous

3. Continuous Duty:

The highest rank. The number associated will describe how much power is maintained throughout the workout.

While many motors will claim to be of identical horsepower, it is pertinent to note that every motor is not built the same. Cheaper prices mean that the product consists of poorly made parts. Do not be swayed solely by low prices. A treadmill that originally cost $1000 or more is likely to possess a durable motor. Less expensive models are not likely to have a reliable motor installed.

Assess what kind of use the treadmill will predominantly be used for. The degree of exercise must be taken into account to make sure your treadmill motor reflects your lifestyle. Certain levels of exercise require specific amounts of horsepower; will it be for walking, jogging, running, or all three? Consider the following:

• For walkers: a 2.0 horsepower continuous duty motor will suffice
• For joggers: 2.5 horsepower continuous duty should be the minimum
• For runners: 3.0 horsepower continuous duty or higher

Also note that if any of the users of the treadmill weigh over 200 pounds, HP should be increased by .5 for proper support, no matter the fitness goals. This means the HP should be at least 2.5 HP for walkers, 3.0 for joggers, and 3.5 for runners. Such precaution will extend the life of your motor.

As for sound, note that motors employing direct current (or known as DC) cause less noise compared to motors that use alternate current (also known as AC). Remember this when deciding where to place your treadmill, especially if you watch the television while you walk or run, or if the treadmill will be in a high traffic area of the home.

Hsiang Neng DC Micro Motor Manufacturing Corporation is the professional manufacturer of DC treadmill motor. If you want to obtain more information about treadmill motor or other actuator motor, welcome to visit the website of Hsiang Neng to see what excellent products they can offer you!

Article Source: http://www.treadmillreviews.net/treadmill-motors-what-you-need-to-know/

Choosing the best multiband antenna for your purposes is a process that involves comparing what features you need with what cost you can afford. You will also need to determine how large of an antenna you will need to accomplish your desired aim or goal for the antenna. Ham radio or amateur radio enthusiasts often require a multiband antenna, and each of these individuals has different requirements as far as the cost, functionality, and size of the antenna, so there is not necessarily one best antenna for everyone.

Size is a key factor when selecting among multiband antennas. First, you will have to determine whether or not you have a place to store or mount the antenna you are selecting. You may also wish research any local building codes that would prohibit your antenna installation based on height, size, or other factors; some municipalities or homeowners associations place restrictions on sizes of external antennas such as these.

The size of the antenna that you choose will directly impact your ability to broadcast and receive signals from various distances, with larger antennas obviously providing a better range. You will need to balance the available space that you have with your requirements for transmitting and receiving power. Installation and mounting are also a factor in determining size, as larger antennas can be more difficult to install.

Cost is also a factor in determining the best multiband antenna for your purposes. A larger, more powerful, more versatile multiband antenna will generally cost more than one that is smaller, less powerful, or less able to handle a variety of different frequencies or functions. Set your budget by determining what you can afford to spend on a multiband antenna and what your level of commitment to the radio hobby is before making your purchase; once your budget is set, you can search for antennas within your cost range that are of the appropriate size.

You will also need to determine what specific functionality you need in a multiband antenna. For example, if you live in a highly populated area, background interference, or “noise,” can be an issue. In an area with high amounts of background noise, you will need an antenna that is powerful enough to transmit despite this. You’ll also want to make sure to choose one that has the proper filtering to remove some of this background noise so you can get a strong signal when receiving transmissions.

Evercom Communication Technology Co., Ltd. is the manufacturer of specializing in mobile antenna and wifi antenna etc. Multiband antenna is also one of excellent products provided by Evercom. If you are interested in learning more information and specification about their antennas, please feel free to contact with them.

Article Source: http://www.wisegeek.com/how-do-i-choose-the-best-multiband-antenna.htm

Power adaptors are devices that make it possible to connect different power sources to a variety of devices. In some cases, a power adaptor can make it possible to use an electrical device like a laptop computer in a foreign country, with no adverse effects to the device itself. Depending on the purpose and function, power adaptors can be relatively inexpensive or quite costly.

One of the most common types of power adaptor is the laptop adapter. Models designed for use by international travelers make it possible for a businessperson from the United States to use his or her laptop computer while on a trip to Europe or the United Kingdom. Some solutions are actually adapter sets that not only provide a selection of prongs for use with different types of outlets, but also transformers that help to convert alternating current to direct current. These kits can help trim travel expenses considerably, since there is no need to pay for expensive conversions during the stay, or to rent equipment for the duration of the trip.

There are other examples of the external power adaptor that are used with different types of electrical equipment. Cell phones and handheld devices often come with a simple power adaptor that make it possible to draw energy from a car battery by plugging one end of the adapter into the vehicle’s cigarette lighter. There are also adapter models that can be connected to small appliances and allow them to make use of electrical current stored in external batteries. Some designs are configured to allow the standard power cord to plug into the adapter on one end, and attach the opposite end of the adapter to an alternative power source, making the adapter an ideal solution during a power outage.

Depending on the particular scope of function, a power adaptor may be somewhat expensive. Devices designed to work with a wide variety of electrical equipment, especially those designed to help convert current, are usually the most expensive. Simpler devices, such as those that make it possible to use and charge a cell phone while in a moving vehicle, are usually available at very little cost. With all types of the adapter, it is important to make sure the products are thoroughly tested and meet minimum safety standards. This is especially important when the adapter is intended for use with expensive equipment, like a laptop, or will be used during a trip abroad.

As a leading and trustworthy power adaptor manufacturer and supplier, Hon-Kwang provides series AC/AC Power Adaptors and AC/DC Adaptors with different output rating, I/P voltage. For more details of Hon-Kwang power adaptors, welcome to check out our website to find power adaptors you need.

Article Source: http://www.wisegeek.com/what-is-a-power-adapter.htm

Motors play an important part in lifting and running a device. They are limited to weight but high efficiency and power capacity motors can easily cover heavy weight situations. Brushless Motors are best used for quadcopters, multicopters and drones.

Choosing motors for copter projects is not an easy task, so for every selection technical specifications such as thrust, power and RPM is to be checked.

Generally, planning to prepare your own project for the first time, weight is to be considered then the thrust to lift the quadcopter. The thrust should be kept higher for proper lifting, flying and landing. According to general statistics, thrust should be kept twice the weight of the quadcopter.

Trust is kept perfect, too low might create difficulties to take off and too high become hard to control.

A light weight copter is more efficient and durable.

Additionally, the battery is also considered an important element for long life of quadcopter. Lithium polymer batteries are best suited for long run as they do not swell nor they heat up faster. Batteries should be charged when it reaches a minimum of 20 percent. Zero percent might lower the durability of the battery. Brushless DC motors accomplished high speed of 10000 RPM or above.

Brushless DC motor architecture sounds very simple and compact. A fixed armature is present in the brushless motor around which permanent magnets rotate. Brushless DC motors are best suited as they produce high torque to weight ratio, increased reliability, more torque per watt, reduced noise, no brush required, as long life, totally eliminates ionizing sparks from the commutator plus reduce electromagnetic interference. Brushless motor commutation is easily implemented using a microcontroller, analogue hardware or digital firmware by using an FPGA. Brushless commutation has greater flexibility, speed limiting, holding torque when stationary, micro stepped operation for slow or fine motion control.

Brushless motors cover a wide range of applications in the field of electronic devices which comprise of computer hard drives, DVD/CD players, refrigeration. They are also favorable to electric vehicles such as bicycle and hybrid vehicles. Users or learners can use brushless DC motor in various quadcopter, multicopter or drones adding additional accessories for a specific function. Copters help in remodeling, transferring load, surveillance, Videography and many more.

After improving its performance, again, both the coils are energized and further improved in a manner such that it pushes the rotor and energize the coils. Therefore, it results in increasing torque and power from the motor. This great achievement is seen in this motor and takes time for other type of motors to grab.

Rebeck Enterprise is the manufacturer of brushless DC motors. Our brushless DC motor, high efficiency can be applied to mechanical precision positioning. And the motor features long life time, high efficiency, low noise, low consumption, variable speed, and many more. Welcome to visit our website to learn further details about brushless DC motor, and feel free to send inquiry to Rebeck!

Article Source: http://EzineArticles.com/9220583

Today’s medical application solutions are getting smaller, not in the sense of importance, but in size. Emergency medical equipment is decreasing in size in order to become portable and usable in the field before a patient ever reaches a hospital. On the spot treatment methods can help stabilize trauma patients and save lives.

For the armed services, field medicine is of critical importance. Soldiers do not have the benefit of full hospitals when they are in a battle zone; typically, they only have access to what medical personnel can carry on their backs or in a truck. Miniaturization has enabled medics to utilize more advanced equipment outside of hospitals to stabilize wounded soldiers and save lives. One particular component that has offered new breakthrough is compact, high torque DC gear motors and DC micro motors.

Let’s take a look at how these devices are implemented and used in real situations.

Fluid Infusion Needs

The first line of treatment for trauma patients is controlled fluid infusion, but conventional units are not suitable for field use. Standard infusion pumps deliver about 100mL of liquid per hour, but a wounded soldier experiencing trauma needs liquids much faster at a rate such as 100ml per minute.

Technology Based Medical Application Solutions

The solution for field equipment to provide rapid fluid infusion for trauma patients and wounded soldiers has to be a compact, low weight, battery operated unit that runs silently and no electronic signature. The basis of the infusion pump is a DC micro motor. This battery operated, miniature high torque motor weighs in under a half of a pound and runs on six triple-A batteries for over 10 hours. These specifications are achieved through efficient operation.

The crux of the design is a unique cartridge set and disposable tube system. When one tube is being compressed, it stored potential energy. Once the tube is empty, that potential energy is recovered as the expansion of the empty tube boosts the action of rocking the yoke to the other side so that it can begin to compress the other tube. In this way, the function of using one infusion cartridge powers the second, doubling the overall flow with only a minimal increase in required power.

The Motor Solution

Of course, to deliver the infusion liquids in such a compact unit, a high torque motor is needed. To find the appropriate battery powered device, a DC micro motor is used to fit the bill. In only a 13mm DC micro motor with a 76:1 gearhead reduction ratio, the infusion pump is able to deliver a sustained 100mL per min or a quick 250mL single burst for critical situations.

The finished Power Infuser product is a base pump unit topped with a disposable cartridge. The unit weighs in less than 10 ounces and measures 5 inches by 4 inches by 2.3 inches. The infuser is able to meet a wide range of criteria and deliver high volume infusions in a compact battery operated unit. Thanks to miniaturized DC micro motors, soldiers on the field have one more tool to ensure that they get home safely.

Hsiang Neng DC Micro Motor Manufacturing Corporation was established in 1985, which is a professional manufacturer of precise DC motors and geared motors. Our main products include geared motors, planetary geared motors, mini motors, large-sized motors as well as motors for treadmills, actuators and etc. If you need more information about DC micro motor and other motors, welcome to visit Hsiang Neng’s website and feel free to contact with us.

Article Source: http://EzineArticles.com/3522228

The importance of clean and potable water can’t be undermined in any way. We all know the importance of water and how essential it is for our survival. The fact that our earth comprises of 70% water is not enough to quench our thirsts as another fact that only a little portion of this huge percentage is actually fit for consumption. Availability of clean drinking water has become a luxury that not all of us are available to enjoy.

The conventional source of drinking water has been tap water. But tap water comes with a lot of risks and health hazards as it contains impurities like phosphates, nitrates and heavy metals. The problem that lies in front of us is: how to quench our thirsts? Technology has gifted us with a lot of inventions that have made our lives much easier and simpler. Another gift of technology is RO water purifier.

Water purified from RO water purifier is relatively pure and also odorless and colorless. Reverse osmosis water purifier gives you water that is free if dissolved minerals. Equipped with the special property of being able to actively absorb toxic substances from water and eliminate them, Reverse osmosis water purifier gives you water which is clean and pure and absolutely fit for drinking.

Fluoride, a harmful chemical that is also responsible for yellowing of teeth is present in considerable quantities in tap water but water purified from RO water purifier is free of this chemical. The process of reverse osmosis removes hardness from water giving soft water which is apt for consumption. Reverse osmosis water is also free from sulfates, arsenic, aluminum, radioactivity, salts, detergents, bacteria and most viruses.

We recognize the advantage of reverse osmosis and thereby fully equip this technology in our water purifiers. We understand the importance of pure drinking water in the present day scenario where the quality of water is deteriorating each day and we often have to compromise on the quality of water. Triwin RO water purifiers provide you clean drinking water that is absolutely fit for consumption.

Established in 1984, Triwin accumulated years of experience in manufacturing products, such as water purifier and other water treatment equipment. We always fulfill the needs for top quality products and equipment in the water treatment industry worldwide. Learn further information about RO water purifier series, please do not hesitate to contact with Triwin directly!

Article Source: http://EzineArticles.com/749951

In electronics, polarity determines how a component should be inserted into a circuit. A non-polarized component can be connected in any direction and will still function properly. A polarized component can only be inserted in one direction. Unlike incandescent light bulbs, which illuminate regardless of the electrical polarity, LEDs will only light with correct electrical polarity. When it comes to through-hole LED’s a polarized component usually has two pins.

If a polarized component is inserted incorrectly it may not work at all, or it may smoke, spark or fail. It’s a little bit harder to determine the polarity with Surface Mount LEDs (SMT LEDs). Surface mounted device LEDs (SMD LEDs) are electronics components without the connecting wires used with through-hole devices. Although initially intended for automatic manufacturing their use has expanded into hobby electronics. Smaller components lead to more compact circuitry and smaller devices. In fact, some components are available in SMD versions only.

Continuity Tests using a Multimeter

Often the easiest way to determine polarity of an SMT LED is by using a simple multimeter. This is achieved by carrying out a simple test: we set the selector to ‘Diode’ or ‘Continuity Test’ mode and place a probe on each end of the LED. Usually, the multimeter will supply enough current into the LED which will just barely light it up. However, there’s no guarantee your meter won’t over-do the current, so we recommend doing just a quick touch, or putting a resistor in line. The black (common) lead on the multimeter indicates the negative (cathode) lead, and the red indicates the positive or anode side. It will only emit light when the negative probe is on the cathode end and the positive probe is on the anode end. When the voltage across the p-n junction of the LED is in the correct direction, a significant current flows and the device is said to be forward-biased. If the voltage is of the wrong polarity, the device is said to be reversed biased, very little current flows, and no light is emitted. Of course, the best method to determine the polarity of your LED, the pinout, along with all the other specs is to locate the manufacturer’s datasheet.

Visual Inspection

The majority of LEDs have the cathode end marked, however it has been noticed that even within the same range of LEDs from the same manufacturer, there are differences. Red LEDs seem to be the exception, having a mark on the anode end, not the cathode one. Most often if you cannot see any of these markings, a small notch or dot will indicate the negative side of an LED. SMT LEDs typically have a dot or small green line indicating their cathode. Lighthouse LEDs provide a selection of SMD images in their Polarity Guide for 0402, 0603, 0805, 1206 and most all SMD LEDs.

DAINA is the professional manufacturer of SMD LEDs, if you have any question about LED series, welcome to send inquiries to DAINA Electronics. Also, welcome to visit our website to learn more information about super bright LED lights, tape LED, cylindrical LED and more products.

Article Source: http://www.limetrace.co.uk/how-to-determine-the-polarity-of-an-smd-led