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DH3-006 | Differential Pressure Controller | range 0-5" w.c. | Dwyer Instruments

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Dwyer Instruments DH3-006 Documents

Instruction Manual Series DH3 Catalog Page DH3 More Info

Overview

Details for DH3-006

The Dwyer Instruments DH3-006 0-3"wc Photohelic Pressure Gauge is a precise and reliable instrument designed for measuring low-pressure air and gas flows. Its high-quality construction and advanced design make it an ideal choice for various industrial applications, including HVAC systems, cleanrooms, and critical environments. Key Features and Benefits: * Measures pressure ranges from 0 to 3 inches of water column (wc) * Â±2% of full-scale accuracy ensures accurate readings * Photohelic technology provides stable and drift-free measurements * Rugged construction with a durable aluminum housing for long-lasting performance * Easy-to-read analog dial with clear graduations for precise readings * Compact size and lightweight for easy installation in tight spaces Applications: * Monitoring air pressure in HVAC systems * Balancing airflow in cleanrooms and critical environments * Testing and calibrating pressure sensors and transmitters * Measuring differential pressure in industrial processes Choose the Dwyer Instruments DH3-006 Photohelic Pressure Gauge for reliable and precise pressure measurements in your industrial applications. Shop our HVAC supply store for the best prices and fast shipping on all your Photohelic Pressure Gauge needs!

Series DH3 Digihelic® Differential Pressure Controller

3 in 1 Instrument: Gage, Switch and Transmitter, Square Root Output for Flow

The Series DH3 Digihelic® Differential Pressure Controller is a 3-in-1 instrument possessing a digital display gage, control relay switches, and a transmitter with current output all packed in the popular Photohelic® gage style housing. Combining these 3 features allows the reduction of several instruments with one product, saving inventory, installation time and money. The Digihelic® controller is the ideal instrument for pressure, velocity and flow applications, achieving a 1.5% full scale accuracy on ranges down to the extremely low 0.25" w.c. to 2.5" w.c. full scale. Ranges of 5" w.c. and greater maintain 0.5% F.S. accuracy. Bi-directional ranges are also available.

The Series DH3 Digihelic® controller allows the selection of pressure, velocity or volumetric flow operation in several commonly used engineering units. 2 SPDT control relays with adjustable deadbands are provided along with a scalable 4-20 mA process output.

Programming is easy using the menu key to access 5 simplified menus which provide access to: security level; selection of pressure, velocity or flow operation; selection of engineering units; K-factor for use with flow sensors; rectangular or circular duct for inputting area in flow applications; set point control or set point and alarm operation; alarm operation as a high, low or high/low alarm; automatic or manual alarm reset; alarm delay; view peak and valley process reading; digital damping for smoothing erratic process applications; scaling the 4-20 mA process output to fit your applications range and field calibration.

Please see Series AT-DH3 for ATEX approved.

For additional ranges, see Series DHC Digihelic® Differential Pressure Controller.

Product Applications

SCFM flow in ducts
Filter status
Static pressures in ducts or buildings
Damper control
Fan control

Specifications

Series: DH3 Digihelic® Differential Pressure Controller
Category/Type: Pressure
Type: Differential Pressure
Series: DH3 Digihelic® Differential Pressure Controller
Service: Air and non-combustible; compatible gases.
Wetted Materials: Consult factory.
Housing Material: Die cast aluminum case and bezel.
Accuracy: ±1.5% for 0.25" and ±0.25" w.c. ranges. Ranges 0.5" to 5" w.c. andcorresponding bi-directional (except ±2.5" w.c.) ±1%; All other ranges: ±0.5% @77°F (25°C) including hysteresis and repeatability (after 1 hour warm-up).
Stability: < ±1% per year.
Pressure Limits: Ranges (uni- and corresponding bidirectional); ≤ 1 in w.c.: 9 psi; 2.5 and 5 in w.c.: 1.5 psi; 10 in w.c.: 3 psi; 25 in w.c.: 8 psi; 50 in w.c.: 15psi; 100 in w.c.: 20 psi.
Temperature Limits: 32 to 140°F (0 to 60°C).
Compensated Temperature Limits: 32 to 140°F (0 to 60°C).
Thermal Effects: 0.020%/°F (0.036/°C) from 77°F (25°C). For 0.25" and ±0.25"w.c. ranges: ±0.03%/°F (±0.054%/°C).
Power Requirements: 12 to 28 VDC; 12 to 28 VAC 50 to 400 Hz.
Power Consumption: 3 VA max.
Output Signal: 4 to 20 mA DC into 900 Ω max.
Zero & Span Adjustments: Accessible via menus.
Response Time: 250 ms (damping set to 1).
Display: Backlit 4 digit LCD 0.4" height LED indicators for set point and alarmstatus.
Electrical Connections: 15 pin male high density D-sub connection. 18" (46 cm) cable with 10 conductors included.
Process Connections: 1/8" female NPT. Side or back connections.
Mounting Orientation: Mount unit in vertical plane.
Size: 5" (127 mm) OD x 3-1/8" (79.38 mm).
Weight: 1.75 lb (794 g).
Agency Approvals: CE.
: SWITCH SPECIFICATIONS
Switch Type: 2 SPDT relays.
Electrical Rating: 1 A @ 30 VAC/VDC.
Set Point Adjustment: Adjustable via keypad on face.