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Specification Sheet

Home      Soil      Temperature      Temperature Sensor Meter      THERM-SS Stainless Steel Thermistor Sensor

Optimal logging solution:   Temperature Sensor Meter

Other Soil Temperature Sensors:         THERM-EP

THERM-SS Stainless Steel Thermistor Sensor

For the measurement of soil, air or liquid temperature.

The stainless steel temperature sensors (THERM-SS) are high quality, low cost sensors for measurement of soil, air or liquid temperature. The sensor consists of a thermistor embedded in a protective stainless steel body. THERM-SS sensors can be used in a wide range of applications from soil monitoring and climate control to concrete monitoring and explosive testing. THERM-SS has a measurement range between -50°C and +100°C. Standard cable lengths are 5 m, 30 m and 50 m however custom length cables are available.


More Details       


  • The THERM-SS is ideally supported by the Thermistor Sensor Meter (TRM), a wireless, stand-alone logging instrument available from ICT International. With the TRM, THERM-SS sensors can be individually calibrated for maximum accuracy.
  • The TRM can support up to 9 x THERM-SS sensors.
  • For complete monitoring solutions, the THERM-SS is used in combination with the MP406 soil volumetric moisture content sensor, tensiometers for soil water potential, ICTO2 soil oxygen sensor, or the ICT International automatic weather station.







Specifications

Sensor Specifications

1. Electrical Characteristic
Item Symbol Test Condition Performance Unit
1.1 Rated Resitance R25°C + 25±0.05°C 10±1% kΩ
1.2 B value B25/85 + 25±0.05°C, 85±0.05°C 3976±1% k
1.3 Time constant t In well stirred water ≤11 sec
1.4 Dissipation factor s In still air ≥2.2 mW/°C
1.5 Voltage withstanding U AC1500V (Peak value) No destroy or spark V
1.6 Insulation resistance Ri DC500V ≥100 MΩ
1.7 Max.power Pmax Ambient Temp. +25°C ≤100 mW
2. Reliability test 3. Operation Notice
2.1 Intensity: Fix the probe, pull the lead by the striped wire end with 10 N force for ± 1 sec. No visible damage. 3.1 Application: Temperature measure and control.
2.2 High Temp. Store (in air) 80±3 °C 100h
ΔR25/R25 ≤ 3%		 3.2 Operating Temp. Range: -50 °C~+100 °C
2.3 Low Temp. Store (in air)
-40±3 °C 1000h
ΔR25/R25 3%		 3.3 Avoid measurement error caused by self heating with excess current.
2.4 Heat and Humidity Stability
40±2 °C 92%RH~98%RH 240h
ΔR25/R25 3%		 3.4 Avoid excessive heat shock, the hot air blow should be at least 10mm from the probe, in cases when a heat shrink protection tube needs to be attached.
2.5 Temperature Shift
-50±3 °C X 30 min 105±3 °C X 30 min 5 times
ΔR25/R25 ≤ 3%

Meter Specifications

Instrument Logging
Instrument Specification Brochure
Analogue Channels 5 double ended or 10 single ended
Resolution 0.00001V—24-Bit
Accuracy 0.001V
Minimum Logging Interval 1 second
Delayed Start Suspend Logging, Customised Intervals
Sampling Frequency 10Hz
Data
Communications USB, Wireless Radio Frequency 2.4 GHz
Data Storage MicroSD Card, SD, SDHC & SDXC Compatible (FAT32 format)
Software Compatibility Windows XP, Vista and Windows 7
Data Compatibility FAT32 compatible for direct exchange of SD card with any Windows PC
Data File Format Comma Separated Values (CSV) for compatibility with all software programs
Memory Capacity 2GB expandable to 64GB
Operating Conditions
Temperature Range -40 ° C to +80 ° C
R/H Range 0-100%
Upgradable User Upgradeable firmware using USB boot strap loader function
Power
Power supply 12V DC 2-wire non polarized bus
Power Consumption 20 mA
Internal Battery Monitoring Logging internal battery voltage & charging current
Charging Rate Automatic variable rate of charging to maximise solar panel charging current on full sun days and or under low light cloudy conditions Variable current 10 mA to 200 mA


Features

Optimal logging solution:   
Temperature Sensor Meter


Logging:
  • Stand-alone logging
  • MicroSD expandable memory
  • Wireless connectivity and data transfer
  • Simple conversion and scripting
  • Flexible sensor calibration, look-up tables, and user scripts
  • 24-Bit resolution
  • IP68 rated water proof enclosure
  • Free Windows utility configuration software
  • Optional wireless logging via MCC1    
Power management:
  • Field: solar power and 12V battery
  • Lab: main power supply
  • Internal Lithium-Polymer battery
  • Internal voltage regulation
  • Optical isolation lightening protection

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ICT International Pty Ltd     P.O Box 503, Armidale, NSW, 2350, Australia     Ph: +61-2-6772 6770

ICT International has provided solutions for soil, plant and environmental monitoring since 1982.
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