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Measures temperature and humidity / output as a 4 ... 20 mA signal / compact
Modbus RTU interface / wall mounting
The relative humidity meter is used in HVAC technology to monitor humidity and temperature. The measured values are output by the relative humidity meter as a standard signal 4 ... 20 mA. In this compact humidity sensor, air humidity and temperature are precisely determined using a semiconductor component. For commissioning, the relative humidity meter is supplied via a DC voltage. The measured variables are output via a two-wire line. All connections are made via screw contacts in the waterproof IP 65 housing. In addition to the output of the measurement signal as a 4 ... 20 mA signal, the measurement values can be output via the RS485 interface. This function is particularly useful if several measuring points are to be linked to one another during your home surveillance.
| Technical data humidity sensor PCE-P18 | ||
| humidity | ||
| measuring range | 0 ... 100% RH | |
| accuracy | ± 2% (in the range 10% .... 90% RH) ± 3% (remaining range) | |
| hysteresis | ± 1% RH | |
| temperature | ||
| measuring range | - 20 ... 60 ° C | |
| accuracy |
| |
| temperature effect | ± 25% / 10 ° C | |
| Humidity sensor output | ||
| analog output | 4 ... 20 mA | |
| Max. connectable resistor at the output | ≤ 500 Ω | |
| Data Interface | RS-485 Modbus RTU | |
| transfer mode | 8N1, 8N2, 8E1, 8O1 | |
| baud rate | 4800 bps 9600 bps 19200 bps 38400 bps 57600 bit / s | |
| General technical data for humidity sensors | ||
| supply voltage | 19 V ... 30 V DC | |
| power | <1.5 W | |
| ambient temperature | - 30 ° C ... 85 ° C | |
| Max. humidity | ≤ 95% RH | |
| preheat | 15 minutes | |
| degree of protection | IP 65 | |
| Assembly | wall mounting | |
| Dimensions (wxhxd) | > 35 x 58 x 118 mm | |
| Weight | 125 g | |
