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The ST4 is a soil temperature probe based on a 10K thermistor (see specification for details).
The thermistor is housed in a stainless steel sheath of 6 mm nominal outside diameter, 120 mm long, connected to a 5 m or 10 m cable.
Thermistor type – 10 K
ST4-05 fitted with 5 m cable
ST4-10 fitted with 10 m cable
Specification
Temperature Sensors
| Type | Description | Probe type | Probe accuracy (°C) | Probe range (°C) | Cable type | Number of cores | Cable range (°C) | Data logger accuracy | ||
| DL6(a) (°C) | GP1(b) (°C) | GP2(c) (°C) | ||||||||
| ST1-05 | Soil temperature probe 2k thermistor, stainless steel sheath, 6s response. | 2k | ± 0.2 | -50 to 150 | PVC | 2 | -10 to +105 | ± 0.4 | ± 0.4 | ± 0.09 |
| ST2-05 | Precision temperature probe, 2k thermistor, stainless steel sheath, 6s response. | 2k | ± 0.1(f) | -50 to 150 | PVC | 2 | -10 to +105 | ± 0.4 | ± 0.4 | ± 0.09 |
| ST3-05 | Sealed thermistor Probe, 2k thermistor, with sealed sheath and leads suitable for continuous immersion in fresh water. | 2k | ± 0.2 | -20 to +80 | Poly-ethelene | 2 | -20 to +80 | ± 0.4 | ± 0.4 | ± 0.09 |
| ST4-05 | Soil temperature probe 10k thermistor, stainless steel sheath, 6s response, IP67. | 10k | ± 0.2 | -10 to +40 | PVC | 2(d) | -10 to +40 | Not available | ± 0.14 | ± 0.08 |
| STK1-05 | General purpose K type thermocouple probe, stainless steel sheath. | k | ± 1.5 | -50 to 250 | PTFE | 2 | -50 to +250 | Not available | Not available | ± 1.0 |
| GT1-05 | General purpose temperature probe, 2k thermistor. | 2k | ± 0.2 | -50 to 150 | PVC | 2 | -10 to +105 | ± 0.4 | ± 0.4 | ± 0.09 |
| MT2-05 | Fast response temperature sensor, 2k, suitable for leaves | 2k | ± 0.1(e) | -50 to 150 | Vy/TEFL(f) | 4 | Not available | ± 0.4 | ± 0.4 | ± 0.09 |
| MT3-05 | Flexible mini-thermistor Probe, 2k thermistor. | 2k | ± 0.1(e) | -50 to 150 | Nylon - PVC | 2 | -10 to +105 | ± 0.4 | ± 0.4 | ± 0.09 |
| AT2-05 | Air temperature sensor, 2k thermistor. | 2k | ± 0.1(e) | -50 to 150 | PVC | 2 | -10 to +105 | ± 0.4 | ± 0.4 | ± 0.09 |
a: Additional (worst case) error due to DL6 Data Logger at -10 to +50 °C. b: Additional (typical) error due to GP1 Data Logger at 0 to +60 °C. c: Additional (worst case) error due to GP2 Data Logger at -20 to +60 °C. d: Co-axial single-core with screen acting as signal loop. e: Over 0-70 °C. f: Teflon lead, vinyl tip.
Accessories
Hardware
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Product Resources
Data Sheets
- Environmental and Meteorological Sensor Specifications 5 MB
Filename: env-and-met-sensors-and-systems-specifications
Software
Manuals
- Temperature Sensors User Manual (covers all Delta-T temperature sensors) 1 MBFilename: Temperature_Sensors_User_Manual_v2.1