Differential Pressure Diaphragm Gauge for Liquids

  • Up to 150 psig line pressure
  • Available in gauge-switch combo, switch only, transmitter only, and gauge-transmitter combo versions
  • Class 1, Div. 1 rated

Specifications: 1804 Diaphragm DP

Model 1804 PDF Downloads: Specifications | Instructions


DP Range Min

DP Range Max

Max Line Pressure

Max Line Temperature


Electrical Availability


PSID 0-0.4
bar 0-0.03
KPA 0-3
In. H2O 0-10
Ft. H2O 0-1
mmH2O 0-250
kg/cm2 0-0.03
SQ. RT. Contact us

PSID 0-8
bar 0-0.6
KPA 0-60
In. H2O 0-225
Ft. H2O 0-18
mmH2O 0-6000
kg/cm2 0-0.6
SQ. RT. Contact us

150 psig
(10 bar)

176°F (80°C)


1 or 2 Switches
1 or 2 relays
4-20 mA signal

How To Order

Select from each of the applicable categories to construct a model number, and configure your instrument. Click the button to request a quote or for more information. If you are reordering you must supply the Part Number from your instrument label. Contact Orange Research or local Orange Research distributors for additional options and pricing information. Please Note: Other Ranges and Measurement Units are available than appear below; specify your needs in the comments box below.


Sample configuration: Gauge (w/ switch option): 1804DGS-1A-3.5B-A-0-1 psid-PL, switch to close at 10 psid asc.
Fields with * are Required.

Buna is Standard
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Popular Options

We can customize parts to your specific needs, with features including:

• Red Arc
• Liquid Filled
• Follower Pointer
• Flanged Dial Case
• … and more

More Options →

Need Help?

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Photos: Explosion Proof DP

Explosion Proof Family

1804 Front

1804 Side

WARNING: Some of our products contain Nickel, a chemical known to the State of California to cause cancer. For more information go to: www.p65warnings.ca.gov

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