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AMETEK pressure transmitter Model 831

The Model 831 transmitters are the most durable, accurate and cost effective fixed range pressure transmitter available. An all 316 stainless steel transmitter, it is designed for years of stable performance in even the toughest environmental and corrosive media conditions. With its all-welded construction, this transmitter is weatherproof and capable of a direct spray with forces up to 200 psi without internal leakage. The Model 831 (standard and low power) has FM and CSA explosion-proof ratings. The 831D (differential pressure) also carries the CSA explosion-proof rating. All Model 831s meet NACE standards for offshore applications. A one year warranty is standard with every unit.

The small size and light weight of the Model 831 transmitter eliminates the need for complicated mounting hardware and mechanical supports, thereby substantially reducing installation time. The in-line connection permits simple field wiring without the need for additional hardware, adding to the speed and ease of installation.

The standard Model 831 and the Model 831D feature a 4 to 20 mA output standard with a 12 to 30 VDC power supply. The Model 831 Low Power provides a three wire 1-5 or 0.8-3.2 voltage output and requires less than 30 millwatts of total power to operate. The combination of low power requirement, small size, excellent performance and low price make the Model 831 Low Power Transmitter ideal for critical outdoor applications. This model requires 6 or 8-14 VDC excitation and is available in pressure ranges from 15 to 5000 psi.

Overall Features

 

  • Available in Differential Pressure, Low Power or Standard version
  • All welded 316L stainless steel construction and wetted parts
  • 3/4 inch NPT female conduit connection cable
  • 1/2 inch NPT female pressure port
  • 24 inch cable length standard
  • All models are CSA approved, explosion proof, and meet NACE standards for off-shore applications
  • The Low Power and Standard versions are FM approved with the explosion proof rating

Product Features

Model 831 Standard

 

  • Available in pressure ranges from 6 psig to 5000 psig
  • Rugged construction
  • Available with conduit adapter
  • Optional EMI protection

Model 831 Low Power

  • Available in pressure ranges from 6 psig to 5000 psig
  • 8 to 14 or 6 to 14 VDC with reverse polarity protection
  • Perfect for solar or battery applications
  • Current draw < 3 mA
  • Optional EMI protection

Model 831D

  • Measures differential pressure
  • Available in pressure ranges from 6 psid to 500 psid

Specifications
 

Functional Specifi cation Service
Standard Pressure Ranges
Output
Null Offset at 77°F (25°C)
Span Offset at 77°F (25°C)
Power Supply (Transmitter must be powered by an approved power supply.)
Loop Resistance (max.) for mA or Load (min.) for VDC
Temperature Limits
Operating and Electronics (Ambient)
Process Interface and Storage
Compensated
Burst Pressure
Overrange Limits
Humidity Limits
Accuracy
Stability
Temperature Effect (between -20° and 180°F (-29° and 82°C) Referenced to 77°F (25°C)
Zero and Span
Vibration Effect
Overrange Effect
Physical Specifications
Process Wetted Parts
Non Wetted Parts
Safety Classifications

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