
1-68
ISO – Wide Temperature Range
Model 85 UltraStable
316L SS Pressure Sensor
High Performance, Small Profile
0-100 mV Output
Absolute and Gage
Low Pressure
Hydraulic Controls
Process Control
Oceanography
Refrigeration/Compressors
Pressure Transmitters
Level Systems
FEATURES
Weldable and O-Ring Flush Mount
-20°C to +85°C Compensated 
Temperature Range
+0.1% Pressure Non-linearity
+1.0% Interchangeable Span 
(provided by gain set resistor)
Solid State Reliability
Low Power
STANDARD RANGES
Range
psig
psia
0 to 15
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0 to 30
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0 to 50
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0 to 100
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0 to 300
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0 to 500
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DESCRIPTION
This ia a micromachined piezoresistive silicon pressure sensor. It 
is designed for OEM applications where compatibility with 
corrosive media must be maintained. The sensor chip is 
mounted on a TO style header, which is resistance welded to a 
316 stainless steel package. A 316 stainless steel convoluted 
isolation diaphragm is welded to the package, sealing a small 
volume of silicone oil between the diaphragm and the sensor 
chip. The ISO pressure housing utilizes the oil column to couple 
the piezoresistive sensor to the isolation diaphragm. A thickfilm 
ceramic compensation board with laser trimmed resistors, and 
an additional gain set resistor to normalize pressure sensitivity 
are an integral part of the sensor package. A variety of threaded 
process fittings are available. Fittings include standards like 1/4 
and 1/8 NPT, 1/4 BSP as well as custom process fittings. 
Electrical options include cable and connector.
DIMENSIONS