Differential pressure gauge adoptsDwyer's simple and wear-resistant Magnehelic structure ® Moving parts can quickly indicate very low pressures of air or non corrosive gases, including positive pressure, negative pressure (vacuum), or differential pressure. Its design is shock resistant, earthquake resistant, and has the ability to withstand overvoltage. It does not have issues with evaporation, condensation, toxicity, or location of pressure gauge liquid; And the price is low.

Magnehelic ® Tables are widely used for pressure measurement of fans and blowers, filter resistance, wind speed, furnace ventilation, pressure drop on both sides of orifice plates, liquid level and fluid amplification in foaming systems, and pressure in hydraulic systems. It can also detect gas and air ratios and automatic valves, as well as blood flow monitoring and respiratory detection in medical equipment.

Specifications

Media: Air and non flammable, compatible gases (natural gas optional)

Shell: cast aluminum shell and transparent cover, with a dark gray coating on the exterior, through168 hour salt spray erosion test

Accuracy: Full scale is± 2% (-0, -100PA, -125PA, ± 3% within 10MM range; -00, -60PA, -6MM range is 4%), the entire temperature range is 70℉(21.1℃）When

Rated pressure:-20 "Hg. to 15 psi. † (-0.677 bar to 1.034 bar); MP medium pressure optional: 35 PSI (2.41 bar); HP High Pressure Optional: 80 PSI (5.52 bar)

Overvoltage protection: ApproximatelyAt 25 PSI (1.72 bar), the pressure relief plug opens and only the standard differential pressure gauge is available

Temperature range:20 to 140℉*(-6.67 to 60)℃）

Size:4-inch (101.6mm) diameter dial

connect:1/8 "FNPT female thread, two pairs of high and low voltage interfaces - one pair on the side and one pair on the back.

Weight:1 lb 2 oz (510 grams), MP and HP weigh 2 lb 2 oz (963 grams)

Standard attachments: Two1/8 "NPT plug, used to block excess ports; Two 1/8 "NPT threaded fittings, used for two high and low pressure interfaces and can be connected to rubber and plastic pipes; Three countersunk installation interfaces with bolts (installation ring, snap on fixing ring used to replace the three joints of accessories on MP and HP meters).

*. Low temperature models are also available

†. For high-frequency pressure changes, it is recommended to use products with higher rated values. See high and medium voltage models.

Installation:mostMagnehelic ® The differential pressure gauge adopts the same housing size. The differential pressure gauge can be surface mounted or embedded using the standard components of the product. If the A-610 pipeline assembly tool is selected, it can be easily installed on horizontal or vertical 1-1/4 inch to 2-inch pipelines. Although calibration is done in a vertical position, many products with a range greater than 1 inch can be used at any angle with simple zeroing. In order to maintain accuracy, the product should be used in the same position as the calibration position. These characteristics make Magnehelic ® The differential pressure gauge can be fixedly installed and used, and can also be used as a portable instrument. To perform embedded installation, a 4-9/16 inch hole is required. Each device is equipped with complete installation and connection components and instructions.

Ventilation valve（A-310A): When applied to pressure that is continuous, while Magnehelic ® The differential pressure gauge is connected to a metal or plastic pipe that is not easy to move. We recommend that you use the Dwyer A-310A vent valve to connect the differential pressure gauge. You can release the air pressure for checking the instrument or zeroing the instrument.

High voltage and medium voltage models（HP and MP: Installation is similar to a standard differential pressure gauge, but the holes for embedded installation are 4-13/16 inches. The medium pressure is determined by the internal pressure and can reach 35 PSI, while the high pressure can reach 80 PSI. There are various range options available. Due to the large size of the casing, it is not suitable for portable devices. Choosing to install the A-321 safety relief valve on a standard Magnehelic differential pressure gauge can provide sufficient protection against rare overpressure situations.

Options and attachments

Transparent outer cover: Paint red and green indicators to highlight and highlight the pressure area

Adjustable signal marker（ASF: Integrated with a plastic case, with an external knob. For most models (except for medium and high pressure models), it can be ordered together with the differential pressure gauge or separately

LED Set Point Indicator (SP): There is a bright red LED light on the right side of the dial, which lights up when the pressure set point is reached. Adjustable from the dial, using 12-24 VDC, with medium or high voltage casing

Portable products（A-432): The portable instrument box can hold all Magnehelic ® Standard range differential pressure gauge (excluding high-pressure models). Includes 9-foot (2.7-meter), 3/16 "I.D. rubber tubing, standard mounting brackets, and port connections

Accessories for air filter meter（A-605): Suitable for various standards of Magnehelic ® Differential pressure gauge. Includes aluminum surface mounting bracket with bolts, two 5 ft (1.5m) long 1/4 "aluminum pipes, two static pressure nozzles, two molded plastic vent valves, fasteners for both ends and valves