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Sierra Instruments has introduced the Innova-Sonic Model 205 thermal energy/BTU meter.

This transit-time ultrasonic flow meter is designed to measure the thermal energy flow rate and totalised energy consumption in liquid heating and cooling applications, including heating, ventilation and air conditioning (HVAC), office buildings, large condominium or apartment developments, solar thermal heating and geothermal heating.

Non-intrusive clamp-on ultrasonic sensor technology facilitates installation.

The Model 205 thermal energy/BTU meter offers high accuracy (+/-0.5 per cent of reading), enabling the custody transfer of thermal energy.

Built-in totalisers and data loggers are used to record daily, monthly and yearly totalised energy usage and to report total energy used.

These functions help to account for energy usage and accurately allocate costs to end users.

A built-in SD card and a supplied data analysis and graphing program enable the storage and analysis of collected data.

The meter includes ultrasonic transducers, remote electronics and two PT100 resistance temperature detectors (RTDs) supplied by Sierra.

The two RTDs – either insertion or surface mounted – measure the temperature of the supply and return flow.

The meter’s electronics then uses these inputs, along with the measured flow rate from the ultrasonic transducers, to calculate the thermal energy flow rate in user-defined units (BTU/hour or kJ/hour, for example).

The meter features an operating temperature range of -40F to +340F (-40C to +170C) and a bi-directional flow range of 0.0fps to 40fps liquids (0-12mps).

The instrument can be used for a range of pipe sizes from 1in to 200in (25mm to 5,000mm).

Sierra Instruments

With in excess of 150 locations in more than 50 countries, our Flow Measurement and Control Division is known for the design and manufacture of innovative high-performance fluid flow measurement and control instrumentation for nearly any gas, liquid and steam application spanning across global industries as diverse as scientific research, semiconductor, wastewater treatment, iron and steel, clean energy, aerospace and biotech, to name a few.

Experience our passion for flow

Our Flow Measurement and Control Division designs and manufactures high-precision capillary-sensor-based mass flowmeters and controllers for gas flow in applications. We also design and manufacture immersible thermal mass, transit-time ultrasonic, vortex shedding and multivariable flow instruments in both standard and customised versions for applications in industrial and hazardous environments.

Our technologies precisely measure and/or control very low flows of gas down to less than 1sccm full scale, as well as extremely high flows of gas, liquid and steam. With rugged product design, cutting-edge innovation and a worldwide team of flow experts, we know you will 'experience our passion for flow'.

Our flowmeters and controllers provide a high return on investment.

  • Direct mass flowmeters provide improved accuracy and cost efficiencies
  • Direct mass flowmeters do not need pressure or temperature compensation equipment or flow computers
  • Flowmeters provide immunity to process changes in P&T, leading to very repeatable measurements
  • In gases, density is highly variable. Unlike mass flowmeters, volumetric gas flowmeters are very sensitive to changes in pressure and temperature
  • Mass flowmeters are a necessity in more than 80 per cent of all industrial processes such as those involving chemical reactions, combustion, respiration and HVAC, which are based on mass flow, not volumetric flow

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