EURSENSE provides pre-calibrated intelligent gas sensor modules, which are ready for use. They come with their own gas chambers, can be diffused, and can be pumped. When used with the EURsense signal conversion board, 1-10 gases can be combined in any way. A variety of power supplies and signal outputs are available. Professional testing software, calibration tools, touch screens, etc. are also available to help you mass-produce your products efficiently and with high quality.
We've been providing solutions to the problems of industrial safety,ambient environmental air quality detection and power & Civil industry over 20 years.
With our technical expertise and knowledge of worldwide industrial markets, EURsense meets the essential needs relating to the safety of personnel and pollution control.
We offer a comprehensive network of specialist Sales to ensure our customers receive first class technical sales and service support across global. If you have a product inquiries or would like to talk to us about finding the right solution to your gas detection requirements, please contact us:
www.eursense.com
sales@eursense.com
Beaumaris House
20 Anglesey Way, Over,
CB24 5LY
Cambridge, United Kingdom
12/F, Innovative Tower
88 Science Park Road,
Sha Tin, Hong Kong, SAR of China
4-20mA converted to 1-5 VDC
You can convert 4-20 mA to 1-5 Volts DC simply with a precision 250 Ohms resistor in series with the measuring device to read volts instead of mA (and you may need protection so add a DC/DC converter, capacitance and other IC as required). For 0-5VDC (or other ranges) it is a little more complicated (see below).
According to Ohm’s law, V = R (E)
Therefore: with 4mA = 0.004 Amps and 20mA = 0.020 Amps
0.004 (Amps) times 250 (Ohms) = 1 Volt
0.020 (Amps) times 250 (Ohms) = 5 Volts
Conversely you can purchase an of the shelf product from virtually any component manufacturer (such as Analog Devices AD202 or AD204) to do this task.
Note: 4-20mA converted to 0-5 VDC/0-10 VDC
For 0-5VDC (or 0-10VDC etc) you need a standard Op Amp difference amplifier which you can look up from any component supplier. Four resistors and an Op Amp plus any bypass capacitors, etc. On the inverting input you set up 1 Volt with a voltage divider. You apply the 1 to 5 V to the non-inverting input. Both the divider and the signal are ground referenced. The gain on the difference amp should be 1.25 so 0V difference gives you 0V out and 4V difference gives you 5V out. Doing this for non-ground referenced signals gets more a little more complicated but the principle is the same.
We do offer accessories such as gas hoods and suitable tubing however we cannot providecalibration gases. For more information please contact EURsense,email sales@eursense.com
Yes, the performance of every sensor is tested before leaving the factory. We ensure that allsensors perform to the specifications in our individual product data sheets.We can trace all testresults for individual sensors using the bar code or serial number on the sensor label.
Calibration interval depends on the application, sensor technology, industry-required performanceand legal requirements. As good practice, sensor calibration should be checked on receipt and thenabout 30 days after installation. Once readings are stable, the calibration check period can beextended to 3, 6 or even 12 months, depending on your application.
Include a particulate filter on your inlet if sampling in dirty environments. If measuring reactive gasessuch as NO2, H2S, O3, Cl2 then use filters constructed from fluorinated substrates if possible.