Duplex Pressure Gauges - 712.25DX

Application

Measurement and indication of two applied pressures
For non-corrosive, non-crystallizing gaseous and liquid media
Heating ventilation and air conditioning (HVAC)

Product Features

Duplex indication with separate black and red pointer
Economical and rugged design
Scale ranges from 0...15 psi (1 bar)
Available in 4½" (115 mm) and 6" (160 mm)

Specifications

Sizes
4½" & 6"
Accuracy
+ 2/1/2% of span
(ASME B40.1 Grade A)
Ranges
Pressure from 0/15 psi (1 bar) to 0/1000 psi (70 bar)
Working Range
Steady: 3/4 of full scale value
Fluctuating: 2/3 of full scale value
Short time: 1.3 x full scale value
Operating Temperature
Ambient: -4^oF to 140^oF (-20^oC to 60^oC)
Media: max. 140^oF (+60^oC)
Temperature Error
Additional error when temperature changes from reference temperature of 68^oF (20^oC) +0.4% of span for every 18^oF (10^oK) rising or falling.
Weather Protection
NEMA 2 (IP 33)
Connection
Material: copper alloy
Lower mount (LM) only
2 x 1/4" NPT
Each side marked with ⊕ or ⊖

Bourdon Tube
Material: copper alloy
Movement
Copper alloy, dual
Dial
White aluminum with black lettering.
Pointer
Material: aluminum
1 black and 1 red non-adjustable pointers
Case
Black cast aluminum with built-in rear flange
Window
Instrument glass
Threaded Ring
Black aluminum
Operating Principle
The right connector (marked plus "+" operates the red pointer. The left connector (marked minus "-") operates the black pointer