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A compact 3.4 cm diameter sensor that fits into tight spaces, the HYDROS 21 is a low-cost, durable, and easy-to-use tool for monitoring EC, temperature, and depth in both groundwater and surface water. More importantly, it’s an all-in-one instrument. When used with our EM60G data logger, you won’t require an additional sensor for determining—and correcting […]
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A compact 3.4 cm diameter sensor that fits into tight spaces, the HYDROS 21 is a low-cost, durable, and easy-to-use tool for monitoring EC, temperature, and depth in both groundwater and surface water. More importantly, it’s an all-in-one instrument. When used with our EM60G data logger, you won’t require an additional sensor for determining—and correcting for—barometric pressure. With a range of 0 to 120 dS/m and a measuring depth of 10 m, the sensor makes accurate EC measurements for a broad range of applications.
| Range | Water depth: 0 to 10,000 mm
Electrical conductivity: 0 to 120 dS/m Temperature: -11 to 49 °C, do not expose to temperatures <32 °F if sensor is in wat |
| Resolution | Water depth: 2 mm
Electrical conductivity: 0.001 dS/m Temperature: 0.1 °C |
| Accuracy | Water depth: +/- 0.05% of full scale @ 20 °C Electrical conductivity: ±0.01 dS/m or ±10% (whichever is greater) Temperature: ±1 °C |
| Operation temperature | 0 to 50 °C (Pressure transducer cannot be allowed to freeze while submersed) |
| Power requirements | 3.6 – 15 VDC, 0.03 mA quiescent, 0.5 mA during 300 ms measurement |
| Dimensions | 9 cm (l) x 3.4 cm (w) |
| Measurement time | 300 ms (milliseconds) |
| Output | Serial TTL, 3.6 Volts Levels or SDI-12 |
| Connector types | 3.5 mm (stereo) plug or stripped & tinned lead wires (3) |
| Cable length | 10 m standard; custom lengths available upon request |
| Software compatibility | ECH2O Utility (rev 1.64+), DataTrac3 (rev 3.4+) |
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