| Remote Sensors for Combustible Gases and Vapors |
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- Simple Calibration and Setup
- Output 4 to 20 mA Linear
- With large LCD display option
- Poison Resistant Sensors
- Ex-proof Housing UL and CENELEC
Stationary Monitoring of
Combustible Gases and Vapors
Detection Principles
The detection principle for the measurement of
combustible gases in the LEL range is the
catalytic combustion (CC) sensor. The catalytic
combustion sensor element is heated. When a
combustible gas or vapor comes in contact with
the sensor, the flammable components of the
gas are burn on the sensor, changing its
electrical resistance. The change in resistance
is proportional to the gas concentration.
To ensure stable measurement signals, all GfG
sensors have integrated electronics circuits for
voltage stabilization, signal transmission and
temperature compensation.
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Technical Data
Gas : Combustible Gases
Vapors
Ranges : 0 ... 100 % LEL
Gas Supply : Diffusion
Signal Connection to Controller : 3 shielded wire x 18 AWG;< 1000 ft
Output Signal : 4 ... 20 mA Linear
Relay : 1 x relay volt-free contact |
Power Supply : 18 to 24 V dc, 300 mA
Housing : Aluminium Explosion proof
Housing Approval : UL Class I, Groups B, C, D. /
CENELEC EEx d IIC T4 ; EN 50014; EN 50018 /
NEMA 4 X ; IP 66
LCD Display : (Model CC 35 only) Digital and LED
Calibration : Potentiometer (CC 34) /
Potentiometer or non-intrusive Magnet (CC 35) |
| Low Maintenance Charge Carrier Injection Sensor |
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- Robust, long-life sensor withstands high NH3 exposure
- Low temperature operation to -40°F (or lower)
- Low cross sensitivity
- Eliminates costly false alarms
- Low cost of ownership
The charge carrier Injection (Cl 21) sensor is a progressive development to Improve upon current ammonia refrigeration detection methods. With Cl 21 technology the Iife of our sensor is no longer limited to ammonia exposure levels. This reduces replacement costs associated with electrochemical sensors.
The charge carrier injection technology also eliminates false alarms frequently associated with metal oxide sensing (MOS). These, along with otner features, provide reliable, cost effective, longterm safety.
The Cl21 transmitter is an advanced development to which all other ammonia transmitters will be compared.
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Technical Data
Gas : Ammonia (NH3)
Ranges : 0 (20) to 200 ppm / 0 (30) to 1000 ppm / 0 (30) to 1% Volume
Gas Supply : Diffusion
Shielded cable : 3 wire x 18 AWG for up to 500 yards
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Output Signal : 0.2 to 1mA or 4 to 20mA
Power Supply : 10 to 32 VDC (300mA maximum)
Expected Sensor life : Greater than 3 years
Sensor Warranty : 2 years
Casing protection : NEMA 4X (IP54)
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