Pulse Input - Contact Closure Sensor

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

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

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

Wireless Features

868 MHz wireless mesh self-healing technology
450 to 600 meter 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

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

Sensor | RXW-UCD-xxx

For Contact Closures
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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 | RXW-UCD-900
| RXW-UCD-868
| RXW-UCD-922

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