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Hobo S-UCD-M001 – Onset

Contact closure puls input adapter with 1 meter of cable, compatible with the USB data loggers stations or with the web-based monitoring systems for remote communication

The contact closure pulse input adapter connects sensors with pulse outputs to data loggers with smart sensors. This smart sensor is compatible with contact closures, such as tipping-bucket rain gauges or reed switches with a maximum input frequency of 2 Hz (2 pulses per second) and a preferred switch-type of normally-open.

This is a plug-and-play smart sensor, who is compatible with RX, H22, and U30 loggers (stations). This sensor is also compatible with the following other sensors: T-MINOL-130 (no-lead water flow meter meter), T-CDI-5200-10S (compressed air flow meter), T-CDI-5400-20S (compressed air flow meter). This sensor operates in indoor and outdoor environments and the S-UCD-M001 sensor supports the following measurements: pulse input and water flow.

Technical specifications

Maximum input frequency: 2 Hz (2 pulses per second)

Measurement range: 0 – 65.533 pulses per logging interval

Resolution: 1 pulse

Lockout time: 327 ms ± 10%

Recommended input type: mechanical contact closure (example: reed switch in a tipping-bucket rain gauge)

Preferred switch state: active low input Normally open

Minimum pulse width: 1 ms

Input/output impedance: 100 KΩ

Open circuit input voltage: 3,3 V

Maximum input voltage: 3,6 V

User connection: 24 AWG wires, 2 leads: white(+), black(-)

Operating temperature range: -40° to 75°C

Overall cable length: 1 meter

Housing: weatherproof PVC housing protects input adapter electronics

Measurement averaging option: no (reports the number of pulses over the logging interval)

CheckOptional with calibration

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