- for measuring relative humidity and temperature
- with capacitive Mela® humidity sensing element
- with current or voltage output
- robust aluminium die-cast housing for outdoor use.
General information
MELA®-humidity/-temperature sensors in this series are supplied with a robust aluminium die cast housing with an aluminium sensor part to measure relative humidity and temperature in air and other non-aggressive gases. The sensor is suitable for outdoor use. The advantages of the series .../9 are its improved dynamics, in particular at low air speeds and also its increased service life, even under more challenging operating conditions (pollutant impact or permanent humidity > 95 %rh). When air speeds are extremely high combined with a high number of particles, using the series .../9 is not recommended. For extreme applications (near the sea, desert, mountains, areas with high air speed etc.) we recommend our stainless steel sinter filter types ZE 21 resp. ZE 22 (not recomme
Technical data
| Humidity | |
| measuring range | 0...100% rh |
| accuracy (10...40°C; 5...95% rh) | ±2% rh |
| influence of temperature <10°C, >40°C | <0.1%/K |
| Temperature | |
| measuring element | Pt 100 class 1/3-DIN |
| measuring range | -30...+70 °C |
| accuracy output: 0...10 V | .....3/4-wire ±0.2 K |
| output: 4...20 mA ...2-wire | ±0.3 K |
| influence of temperature <10°C, >40°C | ±0.007 K/K |
| Other data | |
| ambient temperature | -40...+80 °C |
| operating voltage | |
| current output | 12...30V DC |
| voltage output | 24V±10% AC |
| or 15...30 V DC | |
| degree of protection | IP 65 |
| housing materia | l |
| sensor part | aluminium |
| transformer part | pressure die casting of alu |
| external load (voltage output) | ≥10kΩ |
| external load (current output) | acc. diagramm |
| power consumption (voltage output) | < 5mA |
| minimum air speed across the sensor | |
| output: 0 ... 10V, 2x 0 ... 1V | ≥ 0.5 m/s |
| 4... 20mA, 2x 0 ... 10V | ≥ 1.0 m/s |
| 2x4 ... 20mA | ≥ 1.5 m/s |
| self-heating coefficient Pt100 (v=2m/s in air) | 0.2K/mW |
| electromagnetic compatibility according to EN 61326-2-3 |