Model | Meas. parameters | Output | CO2 range (ppm) |
---|---|---|---|
GMW86P | CO2+T | Current and voltage output, Pt1000 | 0 … 2000 |
GMW83RP 1 | CO2+RH+T | Voltage outputs, Pt1000 | 0 … 2000 |
GMW83DRP 1 | CO2+RH+T | Voltage outputs, Pt1000, display with metric scale output | 0 … 2000 |
GMW83 | CO2+T | Voltage outputs | 0 … 2000 |
GMW83A | CO2+T | Voltage outputs, CO2 indicator LEDs | 0 … 2000 |
GMW83D | CO2+T | Voltage outputs, display with metric scale output | 0 … 2000 |
GMW84 | CO2+T | Current output | 0 … 2000 |
GMW84S | CO2+T | Current output, relay | 0 … 2000 |
GMW87 | CO2 | RS-485 Modbus RTU output | 0 … 5000 |
GMW88 | CO2 | Current and voltage output | 0 … 2000 / 0 … 5000 2 |
Property | Value/Description |
---|---|
Carbon dioxide | |
Measurement range |
0 … 2000/5000 ppm (see table GMW80 models) |
Accuracy 3: | |
at +20 … +30 °C (+68 ... +86 °F) | ±(30 ppm +3 % of reading) |
at +10 … +20 °C (+50 ... +68 °F) and +30 … +40 °C (+86 ... +104 °F) | ±(35 ppm +3.7 % of reading) |
at +0 … +10 °C (+32 ... +50 °F) and +40 … +50 °C (+104 ... +122 °F) | ±(40 ppm +4.8 % of reading) |
Stability in typical HVAC applications | ±(15 ppm + 2 % of reading) over 5 years |
Warm-up time |
1 min 10 min for full specification |
Response time (63 %) |
60 s 7 min (GMW87 and GMW88) |
Carbon dioxide sensor | CARBOCAP® GM10 |
Temperature | |
Measurement range | 0 … +50 °C (+32 ... +122 °F) |
Temperature sensor |
On P models: Pt1000 RTD Class F0.15 IEC 60751 For analog outputs: Digital temperature sensor |
Accuracy (GMW83 and GMW84): | |
at +10 … +30 °C (+50 ... +86 °F) | ±0.5 °C (0.9 °F) |
at +0 … +10 °C (+32 ... +50 °F) and +30 … 50 °C (+86 ... +122 °F) | ±1 °C (1.8 °F) |
Humidity | |
Measurement range | 0 … 95 %RH |
Accuracy at temperature range +10 … +30 °C (+50 ... +86 °F): | |
0 … 80 %RH | ±3 %RH |
80 … 95 %RH | ±5 %RH |
Accuracy at temperature ranges 0 … +10 °C (+32 ... +50 °F) and +30 … +50 °C (+86 ... +122 °F): | |
0 … 95 %RH | ±7 %RH |
Stability in typical HVAC applications | ±2 %RH over 2 years |
Product lifetime | > 15 years |
Property | Value/Description |
---|---|
Operating temperature | 0 … +50 °C (+32 … +122 °F) |
Operating humidity |
0 … 95 %RH Dew point < 30 °C (+86 °F) |
Storage temperature |
Models without display: –40 … +70 °C (−40 … +158 °F) Models with display: −30 … +70 °C (−22 … +158 °F) |
Property | Value/Description |
---|---|
Supply voltage |
18 … 35 V DC 24 V AC ±20 % 50/60 Hz |
Max. current consumption at 18 V DC |
45 mA 70 mA (GMW84 models) |
Max. power consumption at 30 V AC |
0.7 W (GMW83 models) 1 W (GMW86 models, GMW87, and GMW88) 1.2 W (GMW84 models) |
RS-485 interface (in GMW87 only) |
Isolated, supports Modbus RTU protocol
|
Outputs |
4 … 20 mA and/or 0 … 10 V 4 |
Current loop resistance (4 … 20 mA) | 0 … 600 Ω |
Voltage output load resistance | Min. 10 kΩ |
CO2 output scale | 0 … 2000/5000 ppm |
Temperature output scale | 0 … +50 °C (+32 ... +122 °F) |
Humidity output scale | 0 … 100 %RH |
Passive temperature sensor (P models) | Pt1000 RTD |
Temperature setpoint (T models) | 10 kΩ potentiometer |
Relay (S models) |
1 pc, SPST-NO Max. 50 V DC / 50 V AC, 500 mA |
CO2 indicator LED levels (A model) |
Flashing red: > 2000 ppm Red: 1200 … 2000 ppm Yellow: 800 … 1200 ppm Green: < 800 ppm |
Property | Value/Description |
---|---|
IP rating |
IP30 IP64 (GMW87 and GMW88) |
Housing material |
ABS/PC UL-V0 approved PC (GMW87 and GMW88) |
Housing color | White (RAL9003) |
Output connector | Screw terminal |
Max. wire size | 2 mm2 (AWG14) |
Weight |
Plain and LED version: 114 g (4.02 oz) Display version: 124 g (4.37 oz) GMW87 and GMW88: 160 g (5.64 oz) |
Property | Value/Description |
---|---|
EU directives |
EMC Directive (2014/30/EU) RoHS Directive (2011/65/EU) amended by 2015/863 |
EMC compatibility |
EN 61326‑1, industrial environment |
Compliance marks |
CE, RCM |