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  Products > Gas Detectors > Sub-Products > Fixed Gas Detector >
CS21

The transmitter CS21 uses the proven chemosorption detection principle for detection of toxic gases, vapors and combustibles. The extremely short response time of the transmitter allows taking counter measures in time and thereby prevents further damages.

The long life of the sensors makes the CS21 a low cost solution for your detection needs. A transmitter can permanently be operated for more than 5 years. The CS21 gets calibrated before shipment.
 Downloads
Product Toxic Information PDF
Product Combustible Information PDF
CS21 with external sensor
Installation is made easy by wall mounting. The distance between transmitter and controller can be more than 500 m. A rugged aluminum casing protects sensor and electronic from splashing water and dirt.

The transmitter must not be directly operated in ex-areas. For measurement of combustible gases in the LEL-range the gas needs to be sampled towards the transmitter. In this case the ex-protection needs to be guaranteed with suitable, external components, eg: flame-protection.
Smart sensors, intelligent and pre-calibrated
The Smart Sensor Technology makes installation or sensor replacement a matter of seconds - just plug the sensor into the transmitter. The data for a multitude of gases are already stored in the sensor. Adjustments are done with touch keys directly at the transmitter or by means of the remote control (one man calibration).

Datasheet: CS21 - Ammonia monitoring
Datasheet: CS21 - Methane monitoring

  - For areas where no ex-approval is needed
  - Affordable
  - Easy handling
  - Long sensor-lifetime
  - Low follow-up costs
  - Fast response time and high sensitivity
TECHNICAL DATA
Gas :
Ammonia, NH 3
Response time :
tA < 14 s

Detection ranges :

(0)20 .. 300 ppm
(0)30 .. 1000 ppm

Output signal : 0.2 .. 1 mA
4 .. 20 mA
Gas supply : Diffusion through stainless steel
sinter metal filter
Power supply : 10 .. 32 V, 300mA (provided by controller)
Humidity :
20 .. 96 % r.h., non-condensing
Expected sensor life :
> 5 years
Pressure : 920 .. 1100 hPa
Casing protection : IP 54, splash water proof
Ambient temperature : -30 .. +55 °C
Weight : 370 g
Cable connection : Shielded cable
3 x 0.75mm up to 500 m,
3 x 1.5 mm for more than 500 m
PG11 cable gland
Dimensions : 100 x 100 x 57 mm (WxHxD)