2.3 Technical Specification
The Series 47K combustible gas sensors are designed to meet the rigorous requirements of ATEX Directive
2014/34/EU for fixed gas detection installations.
Sensor
Power consumption 1 Watt, typically
Linear dynamic range Standard & PRP & HT-Sensor: 0–100% LEL
Response time t50 ≤10 sec for propane + methane***
t90 ≤20 sec for propane + methane ***
For other gases or vapours the response time may be longer.
Typical sensitivity
PRP- sensor
methane: 12 mV/vol%;
propane: 16 mV/vol%;
HT-PRP- sensor
methane: 12 mV/vol%;
propane: 16 mV/vol%;
Operating configuration Wheatstone Bridge circuit
Operating mode
Constant current
Sensor current
310 mA for 47K-PRP,
300mA for 47K-HT-PRP
Vmax 10 V
Operating life time 3 Years, in clean air, typically
Storage life time 5 Years, in MSA container, typically
Storage temperature range -20 °C to +40 °C**
Operating temperature range
PRP- sensor
Extended range *)
HT-PRP sensor
-25 °C to +55 °C
-40 °C to +55 °C
-40 °C to +160 °C
Operating humidity range 5% to 95% RH non-condensing
Operating pressure range 800–1100 hPa
Ingress Protection IP 6X Sensor *****
IP 6X Junction Box
Air velocity Air velocity 0–6 m/s****
[with duct mount flange: 0.5–20 m/s]
Poison resistance PRP sensor and HT-PRP sensor:
10 ppm HMDS for 40 min.
[max. signal loss 5% of reading]
Dimension Ø 36 x 56 mm
Weight < 230 g
Material St. St. 316
Accessory thread M36 x 1.5 mm
Sensor to junction box ¾” NPT or M25 x 1.5 mm
GB Series 47K 8
2 Description
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