54 Sensor Focus
FCX-MCxx-CH for Low-Maintenance Oxygen Measurements
Measurement of oxygen in the air can be done by various physical processes. The modules presented here are zirconica solid electrolyte sensors from Pewatron (Switzerland), working on the current-limiting principle. Unlike conventional solid electrolyte sensors, these sensors do not require any reference air. This decisive advantage offers a simple method of measuring the current oxygen content without the need for yearly maintenance. Other advantages are the low operating temperature of the zirconia of max. 400 °C, and the power consumption of just 3 W for the entire module. Measurement ranges of 0…25 and 95 % are available with a
precision of 0.1 % O2, even under ambient pressures of -700 mbar to +4 bar. The sensor may be mounted either directly on the PCB inside a flow casing, or alternatively via a cable of up to 5 m in length. In the case of this second variant, measurements may also be made with gas
temperatures of up to 300 °C. The electronics are flexible in use too: with a supply of 11,5…28 VDC models are available ranging from simple analog and (of course) linear voltage or current output signals, through to RS232, RS485, and naturally also I2C-bus.
Typical uses are wherever a long operating life of the sensor without constant recalibration is needed. This includes such areas as medical and biological systems, food processing systems, refrigeration technology, CO2-incubators, and personal safety.
Reader Reply Card No.
New Digital Differential Pressure Sensors with Low Power Consumption
Sensirion (Switzerland) recently launched new differential pressure sensors in the SDP600 series. The new SDP6x6 sensor line features especially low energy consumption, making it suitable for long-term battery operation. The SDP606 and SDP616 sensors are designed to enter sleep mode after performing each measurement. They wake up when a “measure” command is received and enter sleep mode again after completing the measurement. The operation currents of a standard SDP600 sensor can be high as 6 mA, but the new SDP6x6 sensor is optimised for operating currents no greater than 400 µA. There is virtually no current drain (<1 µA) in sleep mode.
This drastic reduction in power consumption allows the new sensors to be used in battery powered applications. The new differential pressure sensors are excellent solutions for medical and HVAC applications, where high accuracy and reliability with very low energy consumption are required.
The new sensors extend the comprehensive product range of Sensirion’s digital differential pressure sensors in the SDP600 series. Along with the other products in this series, they offer a digital I2C output and are fully calibrated and temperature compensated. Thanks to the principle of calorimetric flow measurement, CMOSens® differential pressure sensors achieve outstanding sensitivity and accuracy even at very low pressure differences (< 10 Pa). Furthermore, they have very high long-term stability and are free from zero-point drift. Like all devices in SDP600 series, the new sensors are available in two dif-ferent versions. The SDP606 is intended for direct threaded connection to a pressure manifold with O-ring sealing, while the SDP616 is designed for tube connection.
Reader Reply Card No. 225 223
International Environmental Technology will be exhibiting at Sensor + Test on Stand 12-641 in Hall 12.
Please come and tell us about your new product launches and your company news See you in Nürnburg!
Water Testing Sensor Technology
Supplier of water testing equipment Palintest (UK) recently launched the new ChlordioX Plus to add to their existing range, testing for Chlorine, Chlorine Dioxide and Chlorite. Using the company’s patented disposable electrical sensor technology and a unique sequential methodology, the platform offers analytical performance compared to DPD or Lissamine Green methods, while reducing the potential for user error. The new addition has already proved to be a success in the drinking water, produce washing and industrial hygiene applications.
The sensor technology range includes the SA1100 Scanning Analyser (Lead and Copper), ChloroSense (Chlorine) and ChlordioXense (Chlorine Dioxide). Designed for field analysis, the waterproof units are easy to carry to any monitoring site, and require no chemical reagents. Measurements are made using unique disposable electrodes designed and manufactured by Palintest. Sensors are specific, precise, accurate and stable. They bring a completely new approach to on-site chlorine measurement, providing on the spot measurement which is not dependent on operator technique.
Reader Reply Card No.
OEM Gas Sensors Boost Indoor
Environmental Quality
Green Photonics NIR Lasers:
Gascard NG OEM infrared gas sensors from Edinburgh Sensors (UK) are ideally suited for applications involving the control of indoor environmental quality (IEQ) in commercial, institutional and laboratory buildings. Accurate control of critical indoor environmental parameters such as carbon dioxide and carbon monoxide levels are not only essential for the well-being and comfort of building occupants, but also have a major impact on energy efficiency.
VCSEL Diodes for NIR Gas Analysis
Visit us at the following exhibitions: FOE, Tokyo, April 2012
ECOC, Amsterdam, September 2012 CIOE, Shenzhen, September, 2012
22 2 3 4 More information:
www.vertilas.com Reader Reply Card No. IET March / April 2012
www.envirotech-online.com 226
Using Edinburgh Sensors’ proprietary dual-wavelength infrared sensor technology, the pumped aspiration Gascard NG sensor provides reliable measurement of carbon dioxide and carbon monoxide gas concentrations needed for IEQ applications. Automatic temperature and pressure corrections provide true concentration readings and ensure accurate real-time environmental condition measurements.
With true RS232 communications for control and data logging, along with the option of TCP/iP communications protocol, the Gascard NG can be easily integrated into a wide range of proprietary gas detection systems and multiple sensor architectures. There are also built-in features for multigas and multi- sensor operation together with the flexibility to incorporate additional gas detection technologies.
Reader Reply Card No. 227 224
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72
