Datasheet
© Danfoss A/S (RC-MDP/MWA), 2014-04 DKRCI.PD.S00.A4.02 / 520H2142 3
Gas Detection Sensor, type GDA, GDC, GDHC, GDHF, GDH
Technical data Refrigerants - [ppm] range:
Ammonia (R 717)
Type GDA:
– 0-100 ppm
– 0-300 ppm
– 0-1,000 ppm
– 0-10,000 ppm
– 0-30,000 ppm
Carbon Dioxide (R 744)
Type GDC
0-10,000 ppm
0-20000 ppm
0-40000 ppm
Halo-Carbon - HCFC (R 22, R 123)
Type GDHC
– 0-1,000 ppm
HFC (R 404A, R 507)
Type GDHF
– 0-1,000 ppm
HFC ( R134A)
Type GDHF-R3
– 0-1,000 ppm
Hydro-carbon (R 290, R 600, R 600A, R 1270)
Type GDH
– 0-5,000 ppm
Reference temperature conditions for factory
calibration:
Ambient temperature
For increased accuracy the unit must be calibrated at
the temperature of operation.
Response times may vary based on temperature of
operation, enclosure, and environmental conditions
Alarm thresholds should be set accordingly based on
the environment of operation and the application in
which they are being used
Technical data
(Continued)
Models
Sensor
Standard Basic Standard
Basic with LCD
display
IP 65 with
stainless steel
sensor head
IP 65 enclosure EExd model EExd model
Low
Temperature
IP 66 enclosure
5 m remote
IP 65 sensor
IP 66 enclosure
5 m remote
IP 65 EExd
sensor
Remote LCD
display
IP 41
5 m cable
3
)
Temperature range
EC
1
) –20°C/+40°C
(–4°F/104°F)
0°C/+40°C
(32°F/104°F)
–20°C/+40°C
(–4°F/104°F)
–20°C/+40°C
(–4°F/104°F)
–40°C/+40°C
(–40°F/104°F)
–20°C/+40°C
(–4°F/104°F)
–40°C/+40°C
(–40°F/104°F)
–20°C/+40°C
(–4°F/104°F)
–20°C/+40°C
(–4°F/104°F)
0°C/+40°C
(32°F/104°F)
SC, CT –20°C/+50°C
(–4°F/122°F)
0°C/+50°C
(32°F/122°F)
–20°C/+50°C
(–4°F/122°F)
–40°C/+50°C
(–40°F/122°F)
–20°C/+50°C
(–4°F/122°F)
–40°C/+50°C
(–40°F/122°F)
–20°C/+50°C
(–4°F/122°F)
–20°C/+50°C
(–4°F/122°F)
0°C/+50°C
(32°F/122°F)
IR 0°C/+50°C
(32°F/122°F)
0°C/+50°C
(32°F/122°F)
–20°C/+50°C
(–4°F/122°F)
–40°C/+50°C
(–40°F/122°F)
–20°C/+50°C
(–4°F/122°F)
not available not available not available 0°C/+50°C
(32°F/122°F)
Weight (excluding packing)
EC
912 g (2.01 lb) 947 g (2.09 lb) 903 g (1.99 lb) 562 g (1.24 lb)
4408 g (9.72 lb) 4408 g (9.72 lb) 1199 g (2.64 lb) 1199 g (2.64 lb)
421 g (0.93 lb)SC, CT
IR 3600 g (7.94 lb) not available not available not available
Electrical data
EC
SC, CT
12-24 V d.c., 0.23A
12-24 V a.c. 4 W
12-24 V d.c., 0.23A
12-24 V a.c. 4 W
12-24 V d.c., 0.23A
12-24 V a.c. 4 W
12-24 V d.c., 0.23A
12-24 V a.c. 4 W
Supplied from
connector on GD
motherboard
IR 12- 24 V d.c 0.3 A 12- 24 V d.c 0.24 A not available not available not available
Enclosure
EC
IP 30
(~NEMA 1)
IP 30
(~NEMA 1)
IP 65
(~NEMA 4)
IP 65
(~NEMA 4)
IP 65
(~NEMA 4)
IP 65
(~NEMA 4)
2
) IP 66
(~NEMA 4x)
2
) IP 66
(~NEMA 4x)
IP 41
(~NEMA 1)
SC, CT
IR not available not available not available
1
) Two models.
2
) Remote sensor: IP 65.
3
) For all models except EExd and EExd Low Temp.
Models
Sensor
Standard Basic Standard
Basic with LCD
display
IP 65 for High
RH and Fast
response
IP 65 enclosure EExd model EExd model
Low
Temperature
IP 66 enclosure
5 m remote
IP 65 sensor
IP 66 enclosure
5 m remote IP
65 EExd
sensor
Thread on external sensor
EC
– –
M 42 x 1.5 mm
M 42 x 1.5 mm
M 42 x 1.5 mm M 42 x 1.5 mm M 42 x 1.5 mm M 42 x 1.5 mm
SC M 42 x 1.5 mm 1” 5/16 x 20 UNF 1” 5/16 x 20 UNF M 42 x 1.5 mm 1” 5/16 x 20 UNF
CT M 35 x 1.5 mm 1” 5/16 x 20 UNF M 35 x 1.5 mm M 35 x 1.5 mm M 35 x 1.5 mm
IR M 42 X 1.5mm M 42 X 1.5mm not available not available not available
Material for external sensor
EC
– –
Stainless Steel
Plastic
Stainless Steel Stainless Steel Stainless Steel Stainless Steel
SC, CT Stainless Steel Stainless Steel Stainless Steel Stainless Steel Stainless Steel
IR Stainless Steel Stainless Steel not available not available not available
Sensor head