COMLog IS provides businesses, asset managers and services providers with a cost-effective way to manage energy consumption, reduce energy costs and cut carbon emissions. With more than one hundred thousand data loggers in operation worldwide, HWM is a market leader in the design, manufacture and supply of GSM/GPRS data logging solutions for smart metering in water, energy and Gas.


The COMLog IS is designed specifically to be mounted in close proximity to either a commercial or domestic gas meter (up to and including Zone Zero) but can also be used on any other utility meter that has a pulsed output. The COMLog IS uses accumulative pulse counting technology to calculate index readings against a known volume.
The innovative logger uses the latest integral GPRS technology to provide rapid data transmission at low cost. Low power electronics enable the long battery life to be maintained even with increased transmission rates. The replaceable internal batteries will typically power the device for over five years when data is transmitted every eight hours. Alternatively, external battery packs enable the five year life to be maintained when transmitting data every 15 minutes. COMLog IS is also supplied with an external antenna connection that enables the use of a range of specialist antennas to address the most extreme low signal level locations.
The robust system is supplied with many features that are unique in the market which provide real benefit to our customers. These include: Fast logging (to 1 second) for high- level consumption analysis, a range of comprehensive alarms, automatic default to SMS transmission if GPRS coverage fails and ability to upgrade and programme over-the-air ensuring future compatibility without the cost of a site visit With its tough ABS plastic moulded case, the logger is also fully sealed & submersible to IP68.

Viewing Data:

COMLog IS is designed to be easily integrated into 3rd party software packages either directly via GPRS to a customer data server, or via API through HWM’s DataGate data transfer and fleet management portal.


key features

  • Highly cost effective and reliable
  • Near real time data at low cost
  • High Flow, Low Flow and Profile Alarms
  • Designed for easy Integration into 3rd Party software applications via Datagate API HWM Online web viewing package
  • Typical 5 year battery life
  • 2 Digital Inputs
  • Range of specialist external antennas available
  • Over the air upgrade, ensuring future compatibility without the cost of a site visit
  • Over the air programming, including alarms, saves the cost of a site visit.
  • Accelerated dial in on alarm
  • Certified Intrinsically Safe to ATEX (Zone 0) and IECEx standards.
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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:
The Queen's Award for Enterprise: Innovation 2017
A Halma company
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