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Severe Service
SPECIFICATIONS
ACCURACY
±2.5% of range across full scale
CASE SIZES
40 or 50 mm diameter
CASE MATERIAL
304 Stainless Steel
CASE STYLE
CB – Center Back mount
TUBE & SOCKET
Copper Alloy tube
with nickel plated brass socket
MOVEMENT
Brass
CONNECTION
1
⁄8 NPT & 1⁄4 NPT
RANGES
15 to 160 psi
DIAL STANDARD
Triple scale psi/BAR/kPa
DIAL COLOR
Black markings on white
POINTER
Aluminum, black painted
WINDOW
Acrylic
FILL MEDIUM
Glycerine Standard
RESTRICTOR
Standard, all ranges
VENT PLUG
Filler/pressure relief plug
TEMPERATURE LIMITS
0 – 140º F (filled)
WEIGHT
40mm 0.5 lb.
50mm 0.5 lb.
40MM & 50MM SEVERE SERVICE GAUGE
• Copper Alloy Internals
• Glycerine Filled
• Center Back Mount Only
Marsh Instruments Liquid-Filled Gauges are designed to perform in rugged and harsh environmental conditions - espe-
cially where pulsation and vibration is a problem. Liquid Filled Gauges offer a significant cushioning and dampening
effect, reducing pointer flutter and internal gauge damage. Liquid Filled Gauges feature a ventable top fill plug and
can be mounted on a horizontal or vertical plane. The hermetically sealed construction reduces the chance of leaks
and makes field filling an easy option.
Typical applications include refineries, chemical, oil & gas, marine and OEM processes.
STANDARD RANGES & PART NUMBERS
TYPE 40MM & 50MM GAUGES
Size 40mm 50mm
Case Material 304 Stainless Steel 304 Stainless Steel
Internals Copper Alloy Copper Alloy
Mounting / Case Style CB CB
Connection
Scale Standard psi/BAR/kPa psi/BAR/kPa
0 to 15 psi M4040P M5040P
0 to 30 psi M4042P M5042P
0 to 60 psi M4046P M5046P
0 to 100 psi M4048P M5048P
0 to 160 psi M4052P M5052P
40MM AND 50MM GAUGE OPTIONS
OPTION TYPE SUFFIX AVAILABLE ON MODELS
Custom Dials Custom face M See Marsh Price List for minimums
Other Ranges Consult factory for availability
Fill Medium Silicone (SL) I Consult factory
ALL DIMENSIONS ARE NOMINAL
1
⁄8 NPT
1
⁄4 NPT
A-Size B C E
40mm Dia
50mm Dia
27.00mm
1.06"
30.00mm
1.18"
11.5mm
0.45"
11.5mm
0.45"
13.00mm
0.51"
10.00mm
0.39"
16
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