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Gill Instruments

, award-winning designer and manufacturer of meteorological and environmental measurement instruments, today announced the launch of

TruMet PW100

, its new infrared optical rain gauge.

For decades, rainfall measurement has relied on mechanical tipping bucket gauges. While trusted, these systems are prone to clogging, mechanical drift (requiring frequent calibration for reliable data), and under-counting during high-intensity rainfall, leading to maintenance demands and data uncertainty when accuracy matters most.

Gill’s TruMet PW100 Optical Rain Gauge is meticulously engineered to overcome these long-standing challenges, ensuring true reliability and precision.

A new approach to rainfall measurement

The TruMet PW100

uses a solid-state optical measurement principle rather than mechanical collection. LEDs (light-emitting diodes) create a beam of light across a defined sensing area, and a receiver monitors interruptions in the beam caused by rainfall.

By analysing the size and velocity of droplets, the system accurately measures rainfall accumulation and filters out non-rain interference, such as insects or debris.

With no moving parts, collection funnel, or tipping mechanism, the infrared optical rain gauge delivers accuracy equal to that of traditional tipping buckets, but without the mechanical parts that can fail, reducing maintenance and long-term costs.

Designed for modern monitoring challenges

The TruMet PW100 provides reliable rainfall measurement at a lower lifetime cost, with less complexity or servicing than traditional or specialist instruments.

Typical applications include:

By minimising routine maintenance, the TruMet PW100 Optical Rain Gauge lowers ownership costs and improves data reliability for widely distributed networks.

Engineering confidence from Gill

“Rainfall is changing, yet the industry relies on legacy mechanical technology,,” said

Greg Koch, Product Manager at Gill

. “We didn’t set out to reinvent rain measurement for novelty’s sake. We set out to remove the weakest link. This optical rain gauge delivers trusted accuracy without moving parts and minimal maintenance, which fundamentally changes how rain data can be collected at scale.”

Seamless integration with existing networks

At launch, TruMet PW100 Optical Rain Gauge outputs the standard pulse signal (an electronic output used by weather equipment) that tipping bucket rain gauges use, so it can be deployed as a direct replacement within existing monitoring networks without system changes or retraining.

Software and hardware updates will further expand the optical rain gauge's capabilities and data options.

The TruMet PW100 Optical Rain Gauge will be available both as:

About Gill Group

Gill Instruments is a leader in the design and manufacture of meteorological and environmental measurement equipment, including ultrasonic anemometers and weather stations. Gill’s headquarters are in the UK, with a global presence across EMEA, US, LATAM and APAC. Facilities include research & development, manufacturing, sales and customer support, selling across the world through locally based expert teams and a long-established base of highly experienced distributors.

Gill Group companies have many

accreditations,

and all Gill products are rigorously tested, with many holding specific approvals.

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