LKM455 Temperature and humidity probe with 4...20mA output
The LKM455 is an outdoor temperature/humidity probe with integrated transmitter and two current outputs 4...20mA. It can be used to measure temperature and humidity values in and on buildings, plants and control cabinets as well as outdoors. It is suitable for direct connection to evaluation devices with current input such as PC cards or PLCs. The sensor is supplied fully calibrated. Minor corrections can be made on site by means of two controllers.
The temperature range can be changed customer-specifically with a PC via the built-in serial interface. In addition, the temperature, humidity in %r.H., dew point in °C and absolute humidity in g/m³ can be displayed. The optional communication interface S1 with adapter A1 is required for this.
When entering the temperature measuring range, please note that it is between -30 and +85°C. The minimum range is 20°C.
The measuring range for relative humidity is always 0...100%.
| Input: | Semiconductor sensor | integrated |
| Measuring range temperature: | -20...80°C (standard) | programmable between -30...85°C |
| Measuring range humidity: | 0...100% | |
| Loop voltage: | 10...35VDC | |
| Output: | 2x 4...20mA | |
| Load: | max. 700 at 24V | |
| Measuring error temperature: | typ. 0,5°C | at 25°C |
| Measuring error Humidity: | <2% | |
| Operating temperature range: | -30...85°C | |
| Humidity: | <95% | |
| Clamping type: | Screw terminals | |
| Clamping range: | 0,13...1,5mm² | |
| Dimensions: | 65x58x30mm | L x W x H |
| Weight: | approx. 100g | |
| Housing: | Polyamide white | glass fiber reinforced |
| Degree of protection: | IP64 | |
| EMC: | EN 61326-1 EN 61326-2-3 |
Emission and noise immunity |
► Data sheet in PDF format
► Operating instructions in PDF format
► Service program for LKM45x
► Program for converting analog output values (mA or V) of transmitters to the corresponding temperature