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Please note that WALLACE & TIERNAN is now a trademark of Evoqua Water Technologies LLC, and the products offered here are no longer manufactured under the WALLACE & TIERNAN name.

The manufacturing of the forerly Wallace & Tiernan precision pressure gauges and calibrators has been relocated from Germany and are now being done in the U.S. by WIKA Instrument Corporation. They are certified to NIST Standards before shipment. The Certificate of Calibration is included at no additional cost

Series 1500 8½" Dial High Precision Differential Pressure Gauge

Series 1500 8½" Dial High Precision Differential Pressure Gauge Series 1500 Differential Pressure Gauges have capsule-type pressure elements. High differential pressure is applied to the capsule; low pressure to the case. Available in 22 standard ranges, they combine aneroid convenience with liquid-column accuracy. And they are rugged enough to maintain their high accuracy in test and process applications.


Dial Size:
Scale length:
Approx. 45" through 2 pointer revolutions
To 150 psi
0.066% of full scale
0.01% of full scale
0.1% of full scale for all ranges except 150 psi or equivalent, which is 0.2% of full scale
Maximum temperature effect:
0.1% of full scale per 10°C/50°F change from 23°C/ 73.4°F
Pressure Eelement Volume:
6.9 cc with pointer at zero; 8.6 cc at full scale. For the range 0-125inH2O water only: 6.3 cc with pointer at zero; 8.0 cc at full scale
Case volume:
3070 cc
Maximum case pressure:
35 psig
Maximum case leak rate:
Will not exceed 1.03 x 10-3 std cc/sec or 0.018 psi/hr
Case connections:
1/8" female NPT pressure and static connections. Stainless steel filters are mounted in the orifice of both units and are located in the bottom of the case.
Case construction:
Cast aluminum with tempered-glass dial cover; flush mounted by three screws through the bezel.


Series 1500 8½" Differential Pressure Gauge

Range & Calibration Ordering Number Graduation
0-4.5 psi 62A-4A-0005 0.005 psi
0-10 psi 62A-4A-0010 0.01 psi
0-15.5 psi 62A-4A-0015 0.02 psi
0-20 psi 62A-4A-0020 0.02 psi
0-30 psi 62A-4A-0030 0.05 psi
0-45 psi 62A-4A-0045 0.05 psi
0-60 psi 62A-4A-0060 0.1 psi
0-100 psi 62A-4A-0100 0.1 psi
0-150 psi 62A-4A-0150 0.2 psi
0-125" water 62A-4C-0125 0.2"
0-280" water 62A-4C-0280 0.5"
0-800 mm Hg 62A-4D-0800 1.0 mm
0-31.5" Hg 62A-4B-0031 0.05"
0-60" Hg 62A-4B-0060 0.1"
0-120" Hg 62A-4B-0120 0.2"
0-200" Hg 62A-4B-0200 0.2"
0-300" Hg 62A-4B-0300 0.5"

Vacuum and Compound Ranges

Range & Calibration Ordering Number Graduation
-30" Hg to 0 62A-7B-0030* 0.05"
-15" to 0 to 15" Hg 62A-6B-0030* 0.05"
-30" to 0 to 30" Hg 62A-6B-0060* 0.1"
-30" to 0 to 90" Hg 62A-6B-0120* 0.2"
-30" to 0 to 270" Hg 62A-6B-0300* 0.5"
*Can be calibrated as shown, or in any other standard pressure unit at no extra cost. Specify if other than in Hg.