Click here to download the SpillSens product brochure.


SpillSens is a low-cost, multi-alarm digital float sensor designed to act as an early warning system for blockages and sewer overflows.

ATEX-approved and built to withstand harsh sewer environments, SpillSens uses digital positioning technology to monitor rising levels in the waste water network. Connected to an advanced data logger with integral telemetry, alert messages are transmitted to a dedicated user portal.

SpillSens is a simple to install, robust and cost-effective solution for long-term level monitoring in waste water networks.



When installed at a critical height in the chamber, SpillSens uses digital positioning technology to determine whether it is hanging vertically in mid-air or floating in wastewater.

As network levels alter, the tilt angle of the sensor is continuously monitored and if the tilt angle enters a pre-set range alert messages are transmitted to the bespoke SpillGuard portal.

SpillSens can be connected to, and is powered by, a variety of HWM data loggers. For an intrinsically safe, robust and cost-effective solution we recommend IS Log.

IS Log transmits data through an integral modem with advanced cellular options available. IS Log is also supplied with an external antenna connection that enables the use of a range of specialist antennas to ensure reliable communication on installations with low signal levels.


Key Features and Benefits

  • Three levels of alert: green, amber and red; based on the angle of the sensor:
    • Green - verticle orientation, network operating as expected
    • Amber - movement in orientation, high alert triggered
    • Red - sensor movement >100o, high/high alert triggered
  • Intrinsically safe: certified for use in Zone 0 hazardous areas
  • No moving components: designed to have no moving parts, unlike traditional steel ball and micro-switch state sensors
  • Robust design: durable materials not adversely affected by long-term exposure to waste water environments
  • Cable length options: available with 1m, 2m or 3m cable lengths
  • Compatibility: works in conjunction with IS Log and various other HWM data loggers
  • Online data viewing: via SpillGuard, providing Map View and a variety of valuable features
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HWM-Water Ltd
Ty Coch House
Llantarnam Park Way
Cwmbran, NP44 3AW
T: +44 (0) 1633 489 479 F: +44 (0) 1633 877 857 E: [email protected]
The Queen's Award for Enterprise: Innovation 2017
A Halma company
ISO 9001 ISO 14001 ISO 18001 ISO 27001