Until fairly recent years, you would have used some sort of a chart recorder to record a set of ever-changing data for a given time interval. These mechanical devices can work with either a wind-up spring motor, or with an electrical motor. Sometimes, these devices may still be the most suitable for a given job. Largely, though, they've been replaced by data logger devices.

Data loggers are electronic devices that can have either their own built-in sensors, or the capability to connect to external sensors. Generally, they're battery-powered, small, and have an on-board microprocessor. Some can stand alone, with their own displays and keyboards. Others can hold data in memory for later retrieval, usually by connecting it to a computer. On a computer, data may be either displayed via proprietary software, or via an Excel spreadsheet or graph. Newer devices may also have capabilities for wireless communications, allowing them to send constant streams of data to a base station.

Take a look on the web, and you'll find a wide range of data loggers, from the very inexpensive to ones that cost thousands of dollars. You'll find many different vendors, selling devices for just about any type of data that you can imagine.

Vendors with prominent web-front stores sell a large range of logging devices. You'll find devices for use by electricians, network technicians, weather researchers, home owners, etc. It seems that there's something there for almost anyone.

A homeowner might be interested in energy audit and monitoring devices. There are several different types, including one type that can measure the power draw of an electrical appliance. Then, it'll automatically calculate the annual energy cost for that appliance. Another type of monitoring kit will allow a homeowner to keep an eye on room temperature throughout the house.

Logging devices for industrial or small business use include monitors for HVAC, greenhouses, refrigeration units, or air quality. Air quality monitors can keep a constant check on levels of atmospheric carbon dioxide, carbon monoxide, or other gasses. Use these in closed spaces, where there may be a danger that these gasses may accumulate.

Fleet operators, such as taxi cab or trucking companies, may benefit from the automotive logging devices. These are small devices, which can be connected to a vehicle's OBD-II port. They can monitor engine performance, fuel economy, and how the vehicle is being driven. Some of these devices have wireless capabilities, allowing operators at a base station to see real-time data as vehicles are being driven. Auto mechanics can also make use of OBD-II devices when trying to diagnose engine problems.

For weather researchers, there are several types of monitoring solutions. Some are monitors for specific weather data, such as wind, temperature, humidity, soil moisture content, or rainfall. There are also complete weather monitoring stations, which can monitor multiple types of weather data.

In mines and grain elevators, combustible gas or dust may be present. In these situations, you'd need to use a logging device that's classified as "intrinsically safe". These devices are built so that they won't emit sparks, eliminating a possible cause of explosions.

When shopping for a monitoring solution, be aware of what's included in your purchase. Oftentimes, the price of the data logger device doesn't include the required sensors. So, you'll need to purchase them separately.

Our qualified technicians have over 30 years of experience in providing instrument calibration services and full service repair. We provide a wide range innovative technical solutions, including data logger, humidity sensors, and pressure transducer.

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It seems that many woodworkers do not have an air compressor, merely because they sound difficult.

Some of the handy terms that you need to truly know about when keeping a lookout for a compressor include:

PSI - Pounds per square inch

CFM - Cubic feet per minute

Duty Cycle - how long a compressor can run compared to the quantity of rest time over a thirty minute period. Like it can operate for ten minutes, then rest for 20 without making major head wear

Single Stage - where the compression piston compresses all the air in one stroke

Versus two Stage - where there are two pistons that work in cooperation to compress the air.

If you are planning on running tools like sanders, buffers, grinders and so on you'll need to think about something in the mid-size or maybe large shop size of compressors.

If you're planning on employing grinders, sanders, buffers and the like, you'll need to consider a giant fixed base compressor like Campbell - Hausfeld or Ingersoll-Rand. These will have around six hp and a storage tank of 50 gallons or more . If you're a hobbyist woodworker, who is looking for a nailer or stapler, one of the little portable compressors is perfect. Makers like Porter-Cable or Delta will work fine.

The real trick to getting a compressor is to grasp beforehand what you are going to use it for and what the air-tool rating is in PSI and CFM. This could give you a better indication of the duty cycle you will need. But this isn't the end either, because you need to look CLOSELY at the air tools you are considering as the same tool can vary noticeably in the quantity of compressed air it'll consume. That's's massively important, and it implies the difference between purchasing a mid-size compressor or big fixed compressor. A compressor and associated air powered tools might be a real time saver, even for the hobbyist's work shop.

In the final analysis you must make that difficult call, but what ever you do, make certain you guarantee you get an agreeable compressor for your choice of tools.

Here's more on 12 Volt Air Compressor which you can access via the Discover Air Compressors blog.

Posted under Cars

Are you a frequent traveler who loves to drive on your own? Are you game for exploring new areas of your city / town on your own? Then, you need a companion who can guide you on your way and help you reach the destination in safe and timely manner. Even if you are lost and do not know which way you have to go, this companion can put you back on the right track and prove to be a true friend.

Curious to know who this companion is? It is not a guide dog or a human. It is a cutting-edge device known as the Global Positioning System Receiver or a GPS receiver. Your exact position on a street can be known using this smart device.

The Cobra handheld CB radio is one such amazing pieces of equipment that you would love to use while traveling. It helps you to be on the right path and ask for help when you are lost. There are other streams in which the GPS technology is used. For example, the military uses the GPS systems to guide a missile to a precise target in the enemy territory. And there are quite a few numbers of civilian uses of the GPS system as well, mainly for navigation and tracking purpose. Some of the GPS systems are not good due to the GPS service provided. So, if you are interested in buying a GPS receiver, then, make sure that the service is good before purchasing the device. If you are a owner of a GPS system and it is not functioning properly, then, the first thing you should do is to contact the service provider instead of checking the device for any faults.

One of the other applications of GPS that I find very interesting is where we can place a GPS receiver in a car and a SIM card in the card and make the car tell send an SMS with the GPS co-ordinates to the car owner's mobile. This feature is useful as a security feature where the thieves (stolen car's) location can easily be found by the owner. When a car is stolen by the thief after breaking the glass, the car will automatically alert the owner about the theft and its current position.

The owner can also trigger the car's embedded security system to send an SMS to him / her on need basis. Wonderful security feature isn't it? It is all possible only because of GPS.

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Posted under Cars