Dwyer Air Velocity Transmitter
The Dwyer AVU Series air velocity transmitter is ideal for a wide range of HVAC measurement and control applications, particularly in complete building control and energy management systems. The AVU Series is available with 5% or 8% accuracy at a surprisingly low cost, with 9 models covering ranges from 0-785 FPM to 0-3150 FPM, with either 4-20 mA or 0-10 VDC output. The AVU Series transmitter operates by measuring the heat loss from one of the two sensing elements in the air stream, then calculating the air velocity. Units are virtually immune to drift due to the design of the sensing element, which makes the transmitter accurate over the whole air velocity range.
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Fox Thermal Mass Flow Meter
The Fox FT2A Series thermal mass flow meters are perfect for measuring flow of natural gas, compressed air, propane, oxygen, and most common gases. The flow meters measure both flow rate and temperature with isolated 4-20 mA outputs for both variables. In addition, a separate pulse output can be used for logging total gas flow. The FT2A mass flow meters measure gas flow velocity as low as 50 sfpm (standard feet/minute) and as high as 50,000 sfpm, without the need for temperature or pressure compensation. Each flow meter is calibrated at the factory using the same gas as the application. As a result, the FT2A more than meets EPA accuracy requirements for monitoring both boiler intake gas and combustion emissions.
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Functional Devices Control Transformers
The Functional Devices RIB TR Series offers a complete line of control transformers for use in building automation and temperature control systems. The series includes transformer VA ratings from 20 VA up through 375 VA and primary voltages of 120, 208, 240, 277, and 480 VAC. Isolation transformers for 24 VAC circuits are also included. All RIB TR Series transformers are UL listed and feature split-bobbin construction. Some also have a secondary circuit breaker.
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