Pulse Input - Contact Closure Sensor


Pulse Input - Contact Closure Sensor

  • Vendor:Onset

Availability: Available Item
Qty Price
Buy 1 $387.00 ea
Buy 10 $367.65 ea


The HOBOnet Wireless Pulse Input Sensor connects to sensors with pulse output. This sensor is compatible with contact closures, such as tipping-bucket rain gauges or reed switches. HOBOnet Wireless Sensors communicate data directly to the HOBO RX3000 weather station or pass data through other wireless sensors back to the central station. They are preconfigured and ready to deploy, and data is accessed through HOBOlink, Onset’s innovative cloud-based software platform.

Highlighted Features

Sensor Features

  • Maximum input frequency 2 Hz (2 pulses per second)
  • Mechanical contact closure

Wireless Features

  • 900 MHz wireless mesh self-healing technology
  • 450 to 600 meter (1,500 to 2,000 feet) wireless range and up to five hops
  • Up to 50 wireless sensors per RX3000
  • Simple button-push to join the HOBOnet wireless network
  • Onboard memory to ensure no data loss
  • Powered by rechargeable AA batteries and built-in solar panel

In what environment does this sensor operate?

This sensor operates in indoor and outdoor environments.

What measurements does this sensor support?

The RXW-UCD-xxx sensor supports the following measurement: Pulse Input



For Contact Closures

Measurement 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* Normally open
Edge Detection Falling edge, Schmitt Trigger buffer (logic levels: low =2.7 V)
Minimum Pulse Width 1 ms
Input/Output Impedance 100 K?
Open Circuit Input Voltage 3.3 V
Maximum Input Voltage 3.6 V
User Connection 24 AWG wires, 2 leads: white(+), black(-)

Wireless Mote

Operating Temperature Range -25° to 60°C (-13° to 140°F) with rechargeable batteries
-40 to 70°C (-40 to 158°F) with lithium batteries
Radio Power 12.6 mW (+11 dBm) non-adjustable
Transmission Range Reliable connection to 457.2 m (1,500 ft) line of sight at 1.8 m (6 ft) high
Reliable connection to 609.6 m (2,000 ft) line of sight at 3 m (10 ft) high
Wireless Data Standard IEEE 802.15.4
Radio Operating Frequencies RXW-UCC-900 and RXW-UCD-900: 904-924 MHz
RXW-UCC-868 and RXW-UCD-868: 866.5 MHz
RXW-UCC-922 and RXW-UCD-922: 916-924 MHz
Modulation Employed OQPSK (Offset Quadrature Phase Shift Keying)
Data Rate Up to 250 kbps, non-adjustable
Duty Cycle <1%
Maximum Number of Motes 50 motes per one RX Wireless Sensor Network
Battery Type/
Power Source
Two AA 1.2 V rechargeable NiMH batteries powered by built-in solar panel or two AA 1.5 V lithium batteries for operating conditions of -40 to 70°C (-40 to 158°F)
Battery Life With NiMH batteries: Typical 3-5 years when operated in the temperature range -20° to 40°C (-4°F to 104°F) and positioned toward the sun (see Deployment and Mounting), operation outside this range will reduce the battery service life
With lithium batteries: 1 year, typical use
Memory 16 MB
Dimensions Cable length: 6.5 m (21.3 ft.)
Mote: 16.2 x 8.59 x 4.14 cm (6.38 x 3.38 x 1.63 inches)
Weight Cable: 250 g (9 oz)
Mote: 223 g (7.87 oz)
Materials Mote: PCPBT, silicone rubber seal
Environmental Rating Mote: IP67, NEMA 6
Compliance Marks Federal Communication Commission RXW-UCD-900
  CE Compliant RXW-UCD-868
  Australia and New Zealand Compliance RXW-UCD-922

Data Loggers
Web-based Monitoring Systems - via remote communication