GAS DETECTION 37 New range of ionic ammonia sensors
Ammonia gas is classed as a toxic gas under international regulations and therefore you will require an ammonia gas detection system to monitor the atmosphere to comply in most regions of the world. However, one of the main downfalls of current ammonia gas sensors is that they don’t really fit the bill, especially for refrigeration plants.
Existing electrochemical sensors are consumed by ammonia as they are monitoring. This means if you have a background level in a plant room, then your sensor life will be drastically reduced. This also means, your sensor
could become fully consumed and useless should a gas leak occur. In either case this leads to a detector which no longer correctly reads ammonia, a potentially fatal problem as you no longer have a working ammonia gas detection system.
Current electrochemical sensors are generally only specified to -20 Deg C. Current electrochemical sensors require water vapour to operate. This means, long term performance in an environment around -20 ? will not be good for electrochemical sensor. At -20 degrees centigrade there is little water vapour in the air for the ammonia gas detector to operate.
A current alternative is to use optical sensors for ammonia gas detection based on infrared technology. The problem here is again operation at low temperatures. Temperature compensation, condensation and icing problems all make refrigeration applications a challenge for ammonia infrared sensors.
By adopting advanced materials and careful optimisation of the design, IGD have successfully developed and released a series of long-life ammonia sensors based on ionic technology.
This technology is not consumptive, thus allowing the sensors to operate effectively where ammonia is either continuously present at low levels or during an accidental release.
This technology does not use water in its electrolyte allowing operation down as low as -40 Deg C providing accurate and reliable ammonia gas detection, especially for harsh environments such as industrial refrigeration applications.
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Optical Oxygen Gas Sensor FDO2
OUTSTANDING FEATURES • Lead-free
• Factory-calibrated
• Low power consumption
• 02 partial pressure (T-compensated)
Flow-through cell available as accessory
• Long life, non-depleting • Low drift, high accuracy
• Fast response time (t63 <2 s)
• Standard form factor
Universal electronics for electrochemical sensors has never been so easy
MembraSens 4.0 ,from Membrapor, includes all the features that anyone could wish for, to introduce gas sensors easily and efficiently into an instrument. Its powerful software opens broad possibilities.
The system offers various calculation options to determine gas concentrations, to compensate interferences and to counterbalance temperature influences. Calibration can be done easily and in the preferred way. Different sensor types can be used: 4-electrode and 3-electrode sensors, for reducing or oxidizing gases, with or without bias voltage and that all together with up to 4 sensors.
To operate MembraSens 4.0 a supply voltage of 4 volt is sufficient. The communication is carried out with the Modbus RTU protocol via an RS 485 interface. With this new innovation from Membrapor you can be sure that you are ready for Industry 4.0.
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Data Sheet Revision
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Membrapor has extended its digital data flow and has thereby rebuilt the domain product specifications. With immediate effect you find on the website the data sheets of more than 300 sensors in a new look. MEMBRAPOR has revised the design of its data sheets making them more informative, clear and clean. The specified data has been consolidated and complemented. Our digital processes will continue updating the provided information, with focus on cross-sensitivity and temperature-dependence data. Please contact the technical support team regarding any questions.
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MEMBRAPOR AG, Birkenweg 2, CH-8304 Wallisellen - Zurich Phone +41 43 311 72 00,
info@membrapor.ch,
www.membrapor.com
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The Peak of Swiss Sensor Technology
The independent Swiss sensor developer and producer since 1995
Electrochemical Gas Sensors
Gas detector manufacturers the world over have great appreciation of the direct contact they have with our team. Every year there are more and more who count on our expertise, support and the quality of our sensors.
We have more than 300 sensors, made to measure >20 gases with your: • fixed-point detection systems
• air quality monitors
• portable gas detectors • flue gas analysers
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