Model 300-2.75D

Differential Pressure Test Gauge

Series 300 2.75"

Selected documents
Sales contact




  • Test, laboratory, and production applications

Special Features

  • Accurate and compact in size
  • Sensitive, yet rugged, convenient to use
  • Available in 18 standard ranges (including vacuum and compound ranges)
  • High differential pressure is applied to the capsule; low pressure to the case
  • Maximum static (case) pressure is 150 psig

Standard Features

2¾" dial

Scale Length
7" through one pointer revolution

-400" H20 to 100 psi

0.33% of full scale

0.2% of full scale

Pressure element volume
2.5 cc for the range 0-10" water;
2.0 cc for all other ranges

Case volume
179 cc

Maximum case pressure
150 psig

Maximum case leak rate
Will not exceed 0.64 x 10-5 std cc/sec or 0.0018 psi/hr

Case connection
⅛" female NPT pressure and static connections. Each has a built-in stainless steel filter and is located on the back of the case.

Case construction
Anodized aluminum with tempered-glass dial cover
Flush mounted by four screws through bezel

Materials exposed to measured gas
Pressure element: beryllium copper, brass, soft solder in ranges to 100" water; silver and soft solder in ranges above 100" water.

Case: aluminum, beryllium copper, brass, stainless steel, nylon, ethylene propylene rubber, soft solder, synthetic sapphire, white paint, drawing ink, lacquer.

Ranges above 100" water have silver solder also.


  • Calibration in most metric units is available at no extra cost
  • Other units of calibration are available at extra cost
  • Excess pressure relief valves to 100 psi are available at extra charge

Weight and shipping weight
Approx. 2 lbs.

Ordering Information
When ordering, please specify ordering number, range, and mounting angle. (Extra cost if mounting angle is other than vertical).

Note: This gauge should not be used for corrosive gases or for liquids of any kind.

Differential Pressure Test Gauge
  • Differential Pressure Test Gauge
Wish list - Documents (0)

There are currently no documents on your wish list. You can add any document from the download area to your wish list. To do this, select the desired language using the flag symbol.

The maximum number of 20 entries was reached.

To receive your download link via e-mail, enter your address here:

The e-mail address is invalid.