Datasheet

© Danfoss A/S (RC-MDP/MWA), 2014-04 DKRCI.PD.S00.A4.02 / 520H2142 7
Gas Detection Sensor, type GDA, GDC, GDHC, GDHF, GDH
Bump test A Bump Test consists of exposing the sensor to a gas. The objective is to establish if the sensor is reacting to the
gas and all the sensor outputs are working correctly. A qualified bump test is a test carried out using ampoules or
similar of known concentration.
Bump test of gas sensors (this test is a function test - it is not a calibration)
Method Refrigerant
SC EC CT IR
Semi-
conductor
Electro-
chemical
Catalytic Infrared
Ampoules Ammonia
 
Lighter gas HCFC, HCF

Lighter gas HC - Hydro Carbon
 
Ampoules or (Breath on sensor) CO
2

Ammonia water Ammonia

Technician use only!
This unit must be installed by a suitably qualified technican who will install this unit in accordance with
these instructions and the standards set down in their particular industry/country.
Suitably qualified operators of the unit should be aware of the regulations and standards set down by
their industry/country for the operation of this unit. These notes are only intended as a guide and the
manufacturer bears no responsibility for the installation or operation of this unit.
Failure to install and operate the unit in accordance with these instructions and with industry guidelines
may cause serious injury including death and the manufacturer will not be held responsible in this regard.
Product range
Standard
Basic standard model for machine/engine rooms
and cold rooms
Standard with LCD display
Basic standard model for machine/engine rooms
with the actual reading of present ppm level in the
room and Alarm messages.
IP 65
Two models with IP 65 available:
- IP 65 with stainless steel sensor head.
Temperature down to –20°C(–4°F)
- IP 65 enclosure. Temperature down to
–40°C(–40°F)
EExd
Like Standard but applicable in explosive areas Zone
1 and 2 and higher IP(NEMA).
The sensor is mounted in an external Stainless Steel
head.
Remote LCD (accessory)
Remote LCD display with 5 m cable
Remote sensor
Models with 5 m cable. Can be used in connection
with safety valves/vent pipe applications.
Also available with remote EExd sensor
Danfoss M148D0003_1
IP 66 enclosure 5 m remote IP 65 sensor
IP 66 enclosure 5 m remote IP 65 EExd sensor
Remote LCD display IP 41
IP 65 with stainless steel sensor head
EExd
EExd Low temperature
EExd Low temperature for CO
2
LCD display
Standard
IP 65 enclosure