Our heavy-duty mechanical Swichgage® products combine accurate indication of engine pressure or vacuum with adjustable output contacts for fault alarm and shutdown protection. The MurphyGage® range provides the same accurate indication without output contacts.

The products are available with 2, 2.5 and 4.5 inch (51, 64, and 114 mm) gauge diameters. 2 and 2.5 inch models typically feature:

• Rugged industrial-rated diaphragm movements
• Steel or polcarbonate case options
• Polycarbonate lens
• Bright or black stainless steel bezel options
• environmentally sealed versions
• one wire (ground return) or two wire (insulated return) contact options

4.5-inch dial versions include a Bourdon tube sensing element, cast aluminium case, plus adjustable high and low limit contacts or snap-acting switches.

For ECU/CAN/J1939 engine pressure gauges, click here.

Mechanical pressure & vacuum gauge & Swichgage®:

20P/25P series
The 2- and 2.5-inch (51 and 64mm) dial pressure Swichgage®. Metal case, ground return, optional snap-switch.

A20P/A25P series
The 2- and 2.5-inch (51 and 64mm) dial pressure Swichgage®. Polycarbonate, sealed case, insulated return, optional snap-switch.

20V/A20V/25V/A25V
The 2- and 2.5-inch (51 and 64mm) dial vacuum Swichgage®.

20DP/A20DP/25DP/A25DP
The 2- and 2.5-inch (51 and 64mm) dial differential pressure Swichgage®.

20BPG, 20BVG
'B-series' 2 inch (51mm) dial pressure and vacuum MurphyGage® instruments

OPL
4.5 inch (114mm) dial pressure gauge and Swichgage® instruments

PT167EX
4.5 inch (114mm) dial lead line pressure gauge and Swichgage®

45APE
The 4.5-inch (114mm) dial pressure Swichgage®.

DHK
Oil pressure tubing kits.

Pressure Switches and Sensors:

ESP, ES2P, ESDP
Resistive pressure sensors for EG(S) series electric gauges

ESPS, ESTS
Pressure/temperature sensors, dual output (resistive sender and fault switch)

76.PS
Direct mount pressure switch

PSB
Direct mount pressure switch

PXT-K series
4-20mA pressure transmitters

See also:

PD8100 series pulsation dampeners (info from FW Murphy Production Controls at www.fwmurphy.com)
Dampen pressure pulsations, eliminate gauge pointer flutter, decrease gauge movement wear

Electric gauge & Swichgage®
Electric instruments with resistive senders

CAN / J1939 gauges
Gauges for use with CAN J1939 panels and displays