Specialist Measurement Equipment

At HMPL we pride ourselves on using high quality, robust and reliable equipment, which is in a continual process of improvement and renovation. Here are some examples of our equipment we use in some of our projects which is also available for hire, starting with equipment for measuring wind speed and direction at up to 150 metres height from its location on the ground.

SoDAR

Overview/Function

HMPL have two SecondWind TRITON® SoDAR units. SoDAR (Sonic Detection And Ranging) is a meteorological measurement system used for precise measurement of wind speed and direction at the height of typical wind turbine nacelles.

Key Features

• Simultaneous measurement of wind speed and direction at multiple heights up to 150 metres
• Remote monitoring via satellite link allows continuous observation and data retrieval
• Solar power technology allows for long term measurements without the need for external power supply or battery change
• Can be deployed in remote locations with our off-road vehicles at short notice and without planning requirements

Common Applications

The SoDAR is used for monitoring at wind farms for synchronising noise measurements with wind speed and direction measurements.

Live LEQ

Overview/Function

HMPL now have 7 Rion Live Leq systems, supplied by ANV Systems, which allow remote monitoring/data retrieval from our Rion NL-52 Sound Level Meters.

Key Features

• Live link to sound level meters via 4G technology, allowing shared access to live data via the internet.
• Permits real time audio to be listened to via the online web portal.

Common Applications

The Rion Live Leq system an be utilised at any sound monitoring location. The technology is particularly valuable when up to the minute data is required, or equipment is in a remote location. The remote link also provides assurance of continuous monitoring at critical noise measurement stages, for example if plant is being shut down for the purposes of background noise monitoring.

Apollo

Overview/Function

The Sinus Apollo system from Acsoft is a 4-channel measurement system which facilitates advances sound data acquisition and analysis.

Key Features

• With a multi-channel system is it possible to conduct simultaneous measurements for different acoustic properties, such as low noise environments or low frequency sound components.
• Software allows for precision real-time analysis, including FFT analysis.
• Measurements can also be monitored remotely via the internet.

Common Applications

Low noise and low-frequency noise environments

Met Masts

Overview/Function

HMPL own 4 met masts supplied by Clark Masts that can be deployed in remote locations in order to take wind measurements at a heights of 10-12 metres.

Key Features

• 4 x 12m masts for placing anemometer and wind vane systems
• Our weather monitoring equipment also includes industry standard temperature, barometric pressure and humidity measurement systems, which are regularly calibrated.

Common Applications

Wherever local atmospheric conditions are required, for example at residential properties adjacent to wind farms.

Rugged and Robust

With nearly 30 years’ experience of conducting environmental noise surveys in the harshest conditinos, HMPL can provide equipment which will withstand all extremes of weather conditions while continuing to provide highly accurate measurements with bespoke weather proof equipment regularly maintained by our dedicated technical staff. This includes:

• Surveyors tripod ensuring microphone stability in all weather conditions
• Heavy duty batteries to guarantee sufficient power through each survey
• ETSU compliant windshields prevent wind reaching the microphone without degrading the quality of noise measurements, even in heavy wind conditions.
• All equipment is house within high quality containers to prevent damage throughout years of use.