Temperature Integrated with Soil Moisture

The 5TM delivers temperature, measured by an onboard thermistor, along with accurate volumetric water content. 

 

Engineered for Accuracy

The 5TM determines volumetric water content (VWC) by measuring the dielectric constant of the soil (or other media) using capacitance/frequency domain technology. Signal filtering minimizes salinity and textural effects, making the 5TM accurate in most soils and soilless media. Factory calibrations are included for mineral soils, potting soils, rockwool, and perlite.

 

Easy Installation

The 5TM's small size makes it easy to install in the field and the greenhouse. This robust sensor can be pushed directly into undisturbed soil to ensure good accuracy. 

 

Plug and Read

Get straight to the data with an Em50-series data logger. Just install the 5TM, plug it into the Em50, set the clock and measurement intervals, and start logging data. No programming required.

 

Easy Integration

The 5TM comes standard with both serial and SDI-12 communication options, meaning easy integration with systems manufactured by other companies.

 

Advantages of the 5TM

  • Measures VWC and temperature
  • SDI-12 compatible 
  • 715 mL volume of influence

ACCURACY

Apparent Dielectric Permittivity (εa): ± 1 εfrom 1 - 40 (soil range); ± 15% from 40 - 80

Soil Volumetric Water Content (VWC): Using Topp equation: ± 0.03 m3/m3 (± 3% VWC) typical in mineral soils that have solution electircal conductivity < 10 dS/m; using medium specific calibration, ± 0.02 m3/m3 (± 2% VWC) in any porous medium

Temperature: ± 1°C

RESOLUTION

εa: 0.1 εa from 1-20, < 0.75 εa from 20-80

VWC: 0.0008 m3/m3 (0.08% VWC) from 0 to 50% VWC

Temperature: 0.1°C

RANGE

εa: 1 (air) to 80 (water)

Temperature: -40 - 60°C*

*Sensors can be used at higher temperatures under some conditions.  Contact Decagon for more details.

DIMENSIONS 10 cm x 3.2 cm x 0.7cm
CABLE LENGTH Sensors come standard with 5 m cable. Custom cable lengths available. Maximum cable length of 75 m. Please contact Decagon if you need longer cable lengths.
MEASUREMENT TIME 150 ms
POWER

3.6 - 15 VDC, 0.3 mA quiescent, 10 mA during 150 ms measurement

OUTPUT RS232 or SDI-12
CONNECTOR TYPES

3.5mm "stereo" plug, or stripped and tinned lead wires (3)

DATA LOGGER COMPATIBILITY
(NOT EXCLUSIVE)

Decagon Em50 Series, ProCheck, Campbell Scientific

WARRANTY

One year, parts and labor

ANALOG SENSORS  
SENSOR EC-5 10HS GS1
MEASURES volumetric water content, dielectric permittivity volumetric water content, dielectric permittivity volumetric water content, dielectric permittivity
VOLUME OF INFLUENCE 240 mL 1320 mL 1430 mL
DATA LOGGER COMPATIBILITY Em5b, Em50, Em50G, ProCheck, ECH2O Check, Campbell Scientific* Em5b, Em50, Em50G, ProCheck, ECH2O Check, Campbell Scientific* Em5b, Em50, Em50G, ProCheck, ECH2O Check, Campbell Scientific*

MEASUREMENT RANGE

0 to 100% VWC 0 to 57% VWC 0 to 57% VWC
BEST IF

VWC is all that you need.

You're establishing a large sensor network.

You want a large measurement volume.

VWC is all that you need.

You're establishing a large sensor network.

You're installing in the side wall of a trench.

You need the most rugged sensor available.

BUT NOT IF You cannot apply a regulated voltage (only applies to non-Decagon data loggers).

You are measuring in nursery pots.

You are installing in rocky soil.

You are installing sensors down bore holes.

 

DIGITAL SENSORS  
SENSOR 5TM 5TE GS3 MAS-1  
MEASURES volumetric water content, dielectric permittivity, temperature volumetric water content, dielectric permittivity, temperature, electrical conductivity volumetric water content, dielectric permittivity, temperature, electrical conductivity volumetric water content  
VOLUME OF INFLUENCE 715 mL 715 mL 160 mL 450 mL  
DATA LOGGER COMPATIBILITY Em50, Em50G, ProCheck, Campbell Scientific*, SDI-12 capable Em50, Em50G, ProCheck, SDI-12 capable Em50, Em50G, ProCheck, SDI-12 capable Any logger with 4-m20 mA input (not compatible with Decagon data loggers or ProCheck)  

MEASUREMENT RANGE

0 to 100% VWC

-40 to 60 °C

0 to 100% VWC

-40 to 60 °C

0 to 23 dS/m

0 to 100% VWC

-40 to 60 °C

0 to 25 dS/m

0 to 100% VWC

-40 to 60 °C

 

BEST IF

Measure High temperature variability.

Data must be corrected for temperature effects.

Using SDI-12.

You are managing salts in your system.

You want to use SDI-12.

You are measuring water content of soilless substrates.

You need high accuracy EC.

You are working with a PLC with a 4-20 mA input.

You need extremely long cable lengths.

 

BUT NOT IF N/A You want to monitor soiless substrates or potting soils. You are installing sensors down bore holes.

You want to use Decagon data loggers or ProCheck.

You need a low-power system.

 

Compatibility and Programming Specifications for Campbell Scientific and Other (non-Decagon) Data Loggers

Note: ECH2O sensors are “plug and read” on Decagon data loggers. You do not need to program any of this information (or ANY information) into a Decagon logger.

SENSOR CAMPBELL COMPATIBILITY OTHER LOGGERS OUTPUT VOLTAGE REQUIREMENTS
EC-5 CR10X, 21X, 23X, CR1000, CR3000, etc. Any data acquisition system capable of switched 2.5 to 3.6 V excitation and single ended voltage measurement at 12 bit or better resolution. (Note: some people take their chances with resolution as low as 3 bits, but resolution lower than 10 bits will leave the data quite choppy). Voltage, correlated linearly (soil) or polynomially (growing media) with VWC 2.5-3.6 V
10HS CR10X, 21X, 23X, CR1000, CR3000, etc. Any data acquisition system capable of 3-15 VDC excitation and single ended voltage measurement at 12 bit or better resolution. Voltage correlated with VWC, independent of excitation 3-15 V
5TE Any logger with serial I/O (CR10X, CR850, CR1000, CR3000, etc.) Ask a Decagon representative for an integrator’s guide to interfacing the 5TE Digital ASCIII stream or SDI-12 3.6-15 V
5TM Any logger with serial I/O (CR10X, CR850, CR1000, CR3000, etc.) Ask a Decagon representative for an integrators guide to interfacing the 5TM Digital ASCII Stream or SDI-12 3.6-15 V
GS3 Any logger with serial I/O (CR10X, CR850, CR1000, CR3000, etc.) Ask a Decagon representative for an integrators guide to interfacing the GS3 Digital ASCII Stream or SDI-12 3.6-15 V
GS1 CR10X, 21X, 23X, CR1000, CR3000, etc. Any data acquisition system capable of 3-15 VDC excitation and single ended voltage measurement at 12 bit or better resolution. Voltage correlated with VWC, independent of excitation 3-15 V
MAS-1 Any logger with 4-20 mA output Any logger with 4-20 mA output 4-20 mA 12-32 VDC continuous