Soil temperature sensors

PESSL INSTRUMENTS SOIL TEMPERATURE

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TECHNICAL SPECIFICATIONS

Order number: 600159 / 900124 (iMETOS 3.3), 600020 / 900027 (µMETOS, ECHO)

The Soil Temperature Sensor is a PT1000 in a waterproof stainless steel housing. The sensor output is a duty-cycle signal.

FEATURE	VALUE
Sensor SMT172	Operating temperature range: -30 °C to +75 °C Accuracy: ±0.5 °C (-30 °C to +75 °C)
Sensor PT1000	Operating temperature range: -30 °C to +75 °C Accuracy: ±0.1 °C (-30 °C to +75 °C)
Supply voltage	4.57-7 V
Supply current	max. 200 μA
Short circuit protection	infinite (within supply voltage range)
Short circuit supply current	max. 40 mA
Calibration error	max. 0.25°C (23°C)
Nonlinearity error	max. 0.2°C
Supply voltage sensitivity	max. 0.1°C/V
Repeatability	max. 0.2°C
Long term drift	max. 0.1°C
Output frequency	1 to 4 kHz
Evaluation	Duty cycle
Cable length	5 m

PESSL INSTRUMENTS MULTIPLE SOIL TEMPERATURE

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TECHNICAL SPECIFICATIONS

Order number: 60079/900058 (Sensor chain with box, holder and 3 sensors) / 900227
(Sensor chain with box, holder and 1 sensor) / 900226 (Additional sensor)

SAR19/SAR19M provide soil temperature measurement from several centimeters to 15-meter deep by using the Pessl Instruments sensor BUS. The distance between the sensors can be chosen according the application, but only up to 10 sensors can be attached to one sensor chain.

FEATURE	VALUE
Temperature sensor	DS18B20
Operating temperature range	-55°C to +125°C
Supply DC Voltage (range)	3-5.5 V
Thermometer error -10°C to +85°C	±0.3°C
Drift	±0.2°C
Data transmission	Rs 485 Digital signal (temperature data sent on demand of METOS main board)

PESSL INSTRUMENTS SINGLE SOIL TEMPERATURE

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TECHNICAL SPECIFICATIONS

Order number: 600020 / 900027

WMTEMP is a soil temperature sensor.

Note: The sensor can be connected also to the TEMP-1 input with an appropriate
input reconfiguration.

Necessary Interface to connect this sensor with METOS: ECH871EXT, ECH874EXT or ECH871INT, ECH874INT or RFRN09, RFRN12 or WM-BUS.

FEATURE	VALUE
Temperature sensor	DS18B20
Operating temperature range	-55°C to +125°C
Supply DC Voltage (range)	3-5.5 V
Thermometer error -10°C to +85°C	±0.3°C
Drift	±0.2°C
Data transmission	Rs 485 Digital signal (temperature data sent on demand of METOS main board)