Updated:2023-02-16
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Easy to use
Improved accuracy comes from the six-point factory calibration
Tough,long-lasting body
No recalibration
Low salt sensitivity
Affordability
Excellentrange(sensitivity from -5 kPa all the way to air dry[-100,000kPa])
Onboard temperature measurement
Plug and play capability
Use with the ZL6 for remote access to data on the cloud
SDI-12 compatible
Measurement Specifications | Water Potential | Range:-5 to -100,000 kPa(1.70 to 6.00 pF) |
Resolution:0 kPa | ||
Accuracy: ±(10% of reading + 2 kPa)from -100 to -5 kPa | ||
NOTE:TEROS 21 Gen 2 can read up to 0 kPa when on a wetting path.The air entrvofthe soillimits the performance of the sensor to -5 kPa on the drying curve. | ||
Temperature | Range:-40.00-60.00°C | |
Resolution:0.10°C | ||
Accuracy:±1.00°C | ||
Dielectric Measurement Frequency | 70 MHz | |
Communication Specifications | Output | DDI serial or SDI-12 communication protocol |
Data Logger Compatibility | METERZL6,EM60,and Em50 data loggers or any data acquisition system capable of 3.6-to 15-VDC power and serial or SDI-12 communication | |
Physical Specifications | Dimensions |
Length:9.6 cm (3.8 in) Width:3.5 cm (1.4 in) Height: 1.5 cm (0.6 in) |
Sensor Diameter | 3.2 cm (1.3 in) | |
Operating Temperature Range |
Minimum:-40.00°℃ Maximum:60.00°C NOTE:Sensors may be used at higher temperatures under certain conditions; contact Customer Support for assistance. |
|
Cable Length |
5 m(standard) 75 m (maximum custom cable length) |
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Connector Types | 3.5-mm stereo plug connector or stripped and tinned wires | |
Electrical and Timing Characteristics | Supply Voltage (VCC to GND) |
Minimum: 3.6 VDC Maximum:15.0 VDC |
Digital Input Voltage(Logic High) |
Minimum:2.8 V Typical:3.6 V Maximum:5.0 V |
|
Digital Input Voltage(Logic Low) |
Minimum:-0.3 V Typical: 0.0 V Maximum:0.8 V |
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Power Line Slew Rate | Minimum:1.0 V/ms | |
Current Drain (During Measurement) |
Minimum:3.0 mA Typical:5.0 mA Maximum:16.0 mA |
|
Current Drain (While Asleep) | Minimum:0.0 mA | |
Power Up Time (DDI Serial) | Maximum:50 ms | |
Power Up Time(SDI-12) | Typical:175 ms | |
Measurement Duration | Typical:175 ms | |
Other | Compliance |
Manufactured under ISO 9001:2015 EM ISO/IEC 17050:2010 (CE Mark) |
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