Dwyer's 477 now has "USB Connection Capability" with USB cable and softward CD! Selectable Pressure Units, ±0.5% Accuracy, FM Approved Intrinsically Safe for Hazardous Locations, Class 1, Div. 1, Group A, B, C, D, T4. Packed with features you need to make low pressure measurement and recording faster, easier and more accurate than ever. First, you can instantly select from up to nine of the most widely used pressure units without having to waste time and risk mistakes with tedious conversions. Next, a non-volatile memory function enables storage of up to 40 readings - perfect for HVAC technicians making Pitot tube traverses of airflow readings across a duct

Selectable Engineering Units, Min/Max, ±1.5% Accuracy. 478A-0 and 478A-1 Model Digital Differential Manometer(s).

Quickly verify filter condition, monitor cleanrooms, troubleshoot HVAC systems, or perform field calibrations with the Series 478A Digital Differential Manometer. The Series 478A is an indispensable tool for the HVAC technician, plant engineer, or industrial hygienist. The electronics are housed in a rugged extruded aluminum case to provide long life and exceptional durability. The manometer can be used to measure positive, negative, or differential pressures. The unit features selectable units, auto zero, hold, and Min/Max function. Press the Hold key to freeze the current pressure measurement on the display. The 478A manometer includes a zeroing button to null out any minor pressure differences. The Series 478A Digital Differential Manometer includes a quick start reference guide and a 9V battery.

Use This Sensitive Unit to Measure Low Air Velocities - at Low Cost. Durable low-priced instrument specifically designed to simplify the measurement of low air velocities from 25 to 400 feet per minute. Its small size and light weight - only four ounces make it ideal to carry from one work station to another. A versatile steel mounting bracket for continuous monitoring is also included.

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Dwyer's 485 Digital Hygrometer measures % RH and Temperature. Available in 2 models 485-1 and 485-2. 485 Digital Hygrometer is a versatile, hand-held instrument for measuring percentage of relative humidity and temperature in °F or °C. Dew point and wet bulb temperature is derived from relative humidity and temperature measurements and displayed on the 0.4" LCD

A display Hold key freezes the current temperature and relative humidity readings for situations where readings fluctuate. Store up to 25 readings with the non-volatile memory function - ideal for technicians needing to take multiple readings for later analysis.

Dwyer's 485-2 Digital Hygrometer measures % RH and Temperature and is a versatile, hand-held instrument for measuring percentage of relative humidity and temperature in °F or °C.

Dew point and wet bulb temperature is derived from relative humidity and temperature measurements and displayed on the 0.4" LCD. A display Hold key freezes the current temperature and relative humidity readings for situations where readings fluctuate. Store up to 25 readings with the non-volatile memory function - ideal for technicians needing to take multiple readings for later analysis.

605 Magnehelic® Differential Pressure Indicating Transmitter provides for both visual monitoring and electronic control of very low differential pressure. The Series 605 is ideal for control applications in building HVAC systems where local indication is desired during routine maintenance checks or necessary when trouble shooting the system.

The 628CR housing is small and lightweight for optimum compatibility with OEM systems. The design allows for a variety of pressure ranges from -14.7 to 500 psi and optional electrical connections allowing you to select the right transmitter for your application for service of Compatible gases and liquids

Pump Monitoring

Compressors

Irrigation Equipment

HVAC

Pneumatic Systems

Series 629 Wet/Wet Differential Pressure Transmitter 0.5% Accuracy, NEMA 4X Enclosure monitors differential pressure of air and compatible gases and liquids with 0.5% accuracy. APPLICATIONS: Monitor Differential Pressure Across: Flow Elements Heat Exchangers Filters Pumps Coils

Dwyer Series 631B Wet/Wet Differential Pressure Transmitter Ranges Down to 0.5" w.c. with 500 psi Static Pressure Rating and monitors differential pressure of air and compatible gases and liquids with accuracy.

The Series 634ES Adjustable Range Pressure Transmitter 0.5% Full Span Accuracy, Ranges to 5000 psi. The 634ES Transmitters sense a single pressure for air, compatible gas or liquid and provide 4-20 mA output signal.