CI21 Transmitter

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What distinguishes us from other manufacturers

We are specialists for gas detection solutions, not generalists in safety. No one can be the best at everything, but if you focus on one thing, you can achieve excellence. We work hard to provide you with the best gas detection equipment available, so you can focus on your task without having to worry about the risks that gases can pose. Because of that we invest more heavily in research and development than any other company. Approximately 13% of our annual turnover is reinvested in basic research and the development of new sensors and devices.

A “never say no” approach

This includes finding solutions for customers whose requirements are not met by “off the shelf” products. We take pride in our longstanding cooperation with the Singapore Civil Defence Force (SCDF), for example. For many years now, they have put their trust in GfG’s portable devices, which we optimized to adapt to the Singaporean climate and fulfill the special requirements for integration into the SCDF communication network.

Product Information

The CI21 measures ammonia in small and large measuring ranges from a few ppm to 10000 ppm (equivalent to 1% by volume). The sensor has almost no cross-sensitivities to gases that would trigger false alarms. This applies to vapors from oils and cleaning agents, which are often found in applications where ammonia must be monitored. Hydrogen, which is produced during battery charging, also does not affect the measurement signal.

Resistant to external influences
The transmitter housing is made of aluminum. It is protected against the ingress of dust and splash water (IP54). The sensor can also be mounted remotely if required. The possible cable length can be up to 2 meters. The sensor is insensitive to difficult environmental conditions. The transmitter can be used in temperature ranges between -35 and +55 °C and in dry and humid air (1 to 99 % r. h.).

Communication and service
The transmitter communicates the measured values to a controller for evaluation. Communication is done via the analog industry standard (optionally 0.2-1 mA or 4-20 mA).An optional calibration adapter is offered for the test gas supply for regular function tests. On-site adjustment can be performed by a single person.

Key features at a glance:

General information:

Measuring principle: Charge Carrier Injection (CI)
For ammonia
Optional remote sensor (maximum cable length: 2 m)
Expected sensor lifetime: 2 years
Signal transmission: 0.2-1 mA or 4-20 mA
Protection class: IP54

Optionally available:

Flow adapter, remote calibration adapter, weatherproof housing

Would you like to know more?

Our team can help you with any product information, quotes, or any general questions you may have about the product.

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