Wireless pulse sensor

This WEMS sensor is a battery powered wireless sensor providing one digital (volt-free) input for
status or pulse meter counting. The sensor can feed the data back to your NiagaraAX platform or our wireless BEMS.



  • Digital input configurable for pulsed inputs
  • High performance wireless narrow band operation
  • Up to 2Km line-of-sight range
  • Multi-hop wireless protocol
  • License-free use
  • 69 selectable RF channels
  • IP65 rated
  • Conformal coated to protect against condensation
  • Long battery life


Temperature & humidity

Operating temperature range -10 to +80°C

Operating humidity <90% RH (Non condensing)

Storage temperature -20 to +85°C

Storage humidity <90% RH (non-condensing)



Supply voltage 9VDC

Supply source Lithium PP3 (U9VL-J, U9VL-X, U9VL-FP, U9VL-FP & ER9V)

Current consumption average ~5uA

Current consumption peak 25.4mA

Battery life expectancy up to 5 years, dependent on settings and environment



Digital input Volt free (internal DC supply) or Opto Isolated, 50VDC max, threshold level ~5.5v

RF data

RF frequency 433.05 – 434.79MHz

RF output 8dBm max

RF sensitivity -115dBm

RF bandwidth 25kHz (Narrow band)

RF channels 69

RF connector Female 50Ω SMA (SubMiniature version A)  


Dimensions & mounting

Weight N/A

Width 60mm

Height 76mm

Depth 36mm

Enclosure Flame retardant polycarbonate, IP65

Mounting Direct surface mount, 4 × mounting holes



EN 301489-1: 2008

EN 55022: 2006

EN 61000-4-3: 2006

EN 61000-4-2: 2001 


EN 60950: Information technology equipment

EN 60730: Automatic electrical controls

EN 50366: Domestic equipment


EU R&TTE directive for 25kHz

EN 300 220: EMC standard for short range devices

EN 301 489: EMC standard for radio equipment and services




Become a partner today

Becoming a partner and using our wireless I/O couldn’t be easier. To get started, just request a call back from our partner manager.

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