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OTT Hydrometry Ltd


About OTT UK Ltd: Based in Sheffield, OTT Hydrometry Ltd is dedicated to serving the needs of its clients in the UK and Irish Markets. The company is a subsidiary of OTT Hydromet GmbH in Germany - a precision engineering company formed in the 1870's which has more than 140 years of experience in water monitoring technology. About OTT Hydromet: OTT Hydromet helps water resource professionals generate reliable data throughout the entire water cycle. We go beyond simply providing solutions by partnering with our customers in designing effective answers to the challenges they encounter in their vital role of monitoring the world's water. Proudly formed from five separate companies (OTT, Hydrolab, ADCON Telemetry, Sutron and Lufft), OTT Hydromet offers the combined strength and expertise of leaders in the water quality, quantity and telemetry fields and over 140 years of experience in environmental measurement.


Mr Nigel Grimsley
Unit 19 Jessops Riverside,800 Brightside Lane


S9 2RX

New Present Weather Sensor

A new sensor known as the 'Parsivel®' (PARticle SIze and VELocity) is being launched by OTT Hydrometry, a world leading manufacturer of hydrometric and meteorological instrumentation.

The Parsivel® is an optical disdrometer that provides a vast amount of accurate data on the type and rate of precipitation, from a light drizzle to heavy snow.
Parsivel® achieves this by measuring the effects of both solid and liquid particles passing through a laser-based ribbon of light.

Unlike traditional raingauges, the Parsivel® is extremely sensitive, measuring down to 0.005 mm/hour and is able to maintain accuracy in extreme weather conditions. The unit has an integral heater to dissipate ice should it form on any of the measuring components.

The sensor is ideal for remote use because of its rugged, low maintenance design and simple 12v power requirement.

Data output includes particle size and velocity, rain accumulation and intensity, and present weather reports that can be processed into WMO SYNOP, METAR, and NWS codes.

Measurements are able to identify eight different categories; drizzle, mixed drizzle/rain, rain, mixed rain/snow, snow, snow grains, freezing rain and hail.

Precipitation is monitored globally by radar, however, the Parsivel® is able to provide data with which to 'calibrate' information from the radar, so that accurate predictions can be made, in flood forecasting for example.

In addition, Simon Wills, Ott's UK Managing Director, believes that the Parsivel® will be of great interest in a wide variety of other applications including road safety, military operations, aviation, outdoor sports and industrial research.

For further information please email OTT Hydrometry Ltd

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