Danfoss DGS-SC HFC, DGS-PE, DGS-IR Data sheet
Data Sheet
Gas detecting sensor
Type DGS
Refrigerant gas detection for safeguarding commercial buildings.
DGS sensors can be used in stand-alone or integrated systems, where continuous realtime, automatic monitoring with Danfoss ADAP-KOOL® Refrigeration Control & Monitoring System and/or Building Management Systems is applied.
DGS supports our customers in complying with environmental F-Gas Regulations and Health & Safety requirements on new or existing systems in:
• supermarkets
• process refrigeration plants
• refrigerated storage and warehousing
• special application areas/zones
Typical refrigerant gas applications include:
• halocarbons: HFCs, HCFCs, CFCs
• carbon dioxide (CO /R744)
• hydrocarbons (e.g. R290)
• other special application gases to customer request
Sensing technology varies to make the best detection for a given gas, in terms of performance and cost. DGS-IR is based on infrared sensor technology, DGS-SC is based on semi-conductor and DGS-PE is based on pellistor.
AI227786437234en-000501
Gas detecting sensor, type DGS
Product speci€cation
Technical Data
Table 1: Technical data
Power supply |
24 V DC ± 20 % ; reverse polarity protected |
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24 V AC - 10 % / + 15 % |
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Power Consumption (24 V DC) |
Max. 250 mA (5 VA) |
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Digital input |
Alarm acknowledge and test alarm: Potential-free contact |
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Alarm relay /fault relay: 40 V AC/DC, 0.5 A, change-over contact (SPDT) |
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Critical relay: normally closed (SIL II compliant), warning relay: normally open |
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Analogue output signal |
Proportional, overload and short-circuit proof, load ≤ 500 Ohm |
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Measuring range: 0 – 10 V / 2 – 10 V / 0 – 20 mA / 4 – 20 mA |
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MODBUS Physical |
5 V DC, 250 mA max. overload, short-circuit and reverse-polarity protected |
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Enclosure rate |
IP 65 |
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Humidity range |
15 – 90 % RH not-condensing |
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Burning behaviour |
UL 94 V2 |
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Housing colour |
Black |
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Dimensions (W x H x D in mm) |
94 x 130 x 57 |
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Installation |
Wall mounting |
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Cable entry |
2 x M12 / 3 x M20 |
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Wire connection: |
Power supply, MODBUS: Screw-type terminals 0.25 – 2.5 mm2 |
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Analogue output, Digital input: Screw-type terminals 0.25 – 1.3 mm2 |
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Sensor head: 3-pin plug connector |
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Sensor information |
DGS-IR (CO2) |
DGS-SC (HFC) |
DGS-PE (Propane) |
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Temperature range |
-35 – 50 °C |
-35 – 60 °C |
-30 – 60 °C |
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Response time T90 |
<120 sec. |
<40 sec. |
<10 sec. |
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Recovery time, T0 |
90 sec. |
180 sec. |
120 sec. |
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Maximum calibration interval |
60 months |
12 months |
6 months |
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Measuring range |
0 – 20000 ppm |
0 – 2000 ppm |
0 – 5000 ppm |
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Default alarm threshold |
5000 ppm |
500 ppm |
800 ppm |
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Compliance |
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EN61010-1 |
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No61010-1 |
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B&L - Buzzer and Light (option by |
Light (LED): Red / yellow /green (alarm - fault - operation - service) |
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product selection) |
Buzzer: >85 dB (A) (0.1 distance ) 2300 Hz |
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© Danfoss | Climate Solutions | 2021.03 |
AI227786437234en-000501 | 2 |
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