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DUAL PURPOSE SOIL & AIR TEMPERATURE SENSOR
The dual purpose soil temperature and air temperature sensor is designed to be used for measuring the soil temperature for seeding and later to be used for air temperature inside the convection cap.
The sensor is designed to be inserted under all soil conditions and depth without breaking preventing a temperature bridge and offers multiple use as simple, economic and practical solution for arable farmers.
Technical details
| Sensor | SMT172 |
| Supply voltage | 4.57 – 7 V |
| Supply current | max. 200 ?A |
| Short circuit protection | Infinite (within supply voltage range) |
| Short circuit supply current | max. 40 mA |
| Operating temp. range | -30°C to +99°C |
| Accuracy | min. 0.5°C (-30°C to +99°C) |
| 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 |
| Duty cycle | 0.320 (0°C), 0.00470/°C |
| Evaluation | Analogic |
| Cable length | 5 m |
| Part.no. IM5042 | Soil and air temperature in carbon fiber tube with convection cap |
| Part.no. IM5021D | Single air temperature sensor with convection cap with 5 meter cable |