Onset
1m Contact Closure Pulse Input Adapter
Connects sensors with pulse outputs to data loggers with smart-sensor inputs. 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.
Documentation
User ManualHighlighted Features
- 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)
Applications
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
Specifications
| Specification | Detail |
|---|---|
| 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) |