HDH transmitters are designed for detecting and controlling CO₂, temperature and humidity in dry room spaces. ABCLogic™ self-calibration method eliminates the possible long term drift.
| Supply | 24 Vac/dc, < 10 VA |
| Range (CO₂) | 0…2000 ppm |
| Range (temperature) | 0…50 °C |
| Range (humidity) | 0…100 %rH |
| Time constant | < 2 min |
| Accuracy (CO₂) | typ. ±40 ppm ±3 % of value |
| Accuracy (temperature) | ±0,5 °C |
| Accuracy (humidity) | ±2 %rH |
| Output | 4 x 0…10 Vdc, 2 mA |
| Protection class | IP20 |
| Materials | ABS plastic |
| Ambient temperature | 0…50 °C |
| Mounting | with screws on wall or on junction box |
| Dimensions | 87 x 86 x 30 mm |
| TYPE | ARTICLE | DESCRIPTION |
| HDH | 1135040 | room transmitter, CO₂ and temperature measurement |
| HDH-N | 1135041 | room transmitter with display |
| HDH-RH | 1135044 | room transmitter, CO₂ and humidity measurement |
| HDH-RH-N | 1135045 | room transmitter with display |
| HDH-M | 1135100 | Modbus room transmitter, CO₂ and temperature measurement |
| HDH-M-N | 1135101 | Modbus room transmitter with display |
| HDH-M-RH | 1135102 | Modbus room transmitter, CO₂ and temperature and humidity measurement |
| HDH-M-RH-N | 1135103 | Modbus room transmitter with display |
| HDH 10K | 1135110 | room transmitter, CO₂ and temperature measurement, range 0…10000 ppm |
| HDH 10K-N | 1135111 | room transmitter with display |
| HDH-BAC | 1135200 | BACnet room transmitter, CO₂ and temperature measurement |
| HDK-BAC-N | 1135201 | BACnet room transmitter with display |
| ML-SER | 1139010 | transmitter commissioning tool |
| MPCC | 1139020 | PC configuration tool for Modbus products |
| HD-AL3 | 1135048 | 3 leds indicating different CO₂ levels (not available for N models) |
| HD-P | 1135001 | passive potentiometer (not available for Modbus models) |
| HD-PU | 1135002 | 0…10 V potentiometer |
| HD-R | 1135003 | relay, 24 Vac 1 A |
