The Contact Closure Pulse Input Adapter connects sensors with pulse outputs to data loggers with smart-sensor inputs. 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. See how the pulse recorder works.
- Plug-n-play adapter for pulse output sensors
- Automatically recognized by H21, H22, U30, and ZW data loggers
- 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)
In what environment does this sensor operate?
This sensor operates in indoor and outdoor environments.
What measurements does this sensor support?
The S-UCD-M001 sensor supports the following measurements: Pulse Input and Water Flow
To see the full specifications for this product, please see our product manual found under the documentation tab if available.
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
Edge detection: Falling edge, Schmitt Trigger buffer (logic levels: low ≤ 0.6 V, high ≥ 2.7 V)
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 (-40° to 167°F)
Overall cable length: 1 m (3.3 ft.)
Housing: Weatherproof PVC housing protects input adapter electronics
Housing dimensions: 14 x 0.95 cm (5.5 x 0.375 in.)
Weight: 310 g (11 oz.)
Bits per sample: 16
Number of data channels: 1
Measurement averaging option: No (reports the number of pulses over the logging interval)