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  • Current and voltage outputs available
  • 316 stainless Steel and Elgiloy wetted parts
  • Factory Mutual and Canadian Standards Association approved
  • CE compliant to suppress RFI, EMI and ESD
  • NACE MR0175/ISO 15156 compliant
  • NSI/ISA-12.27.01 approved single seal
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621/622 Series Explosion-Proof Pressure Transmitters

0 to 10,000 psig, 0.25% Accuracy (Best Fit Straight Line (BFSL), 4 to 20 mA Output, 1/4" National Pipe Thread (NPT) Male Explosion-Proof Pressure Transmitter with 1/2" National Pipe Thread (NPT) Conduit (6 ft Cable Attached)
621/622 Series Explosion-Proof Pressure Transmitters

0 to 10,000 psig, 0.25% Accuracy (Best Fit Straight Line (BFSL), 4 to 20 mA, 1/4" National Pipe Thread (NPT) Male Explosion-Proof Pressure Transmitter with 1/2" National Pipe Thread (NPT) Conduit (6 ft Cable) and 0.8 mm Stainless Steel Threaded Orifice
621/622 Series Explosion-Proof Pressure Transmitters

0 to 10,000 psig, 0.25% Accuracy (Best Fit Straight Line (BFSL), 4 to 20 mA Output, 1/2" National Pipe Thread (NPT) Male Explosion-Proof Pressure Transmitter with 1/2" National Pipe Thread (NPT) Conduit (6 ft Cable Attached)
621/622 Series Explosion-Proof Pressure Transmitters

0 to 10,000 psig, 0.25% Accuracy (Best Fit Straight Line (BFSL), 1 to 5 Vdc Output, 1/4" National Pipe Thread (NPT) Male Explosion-Proof Pressure Transmitter with 1/2" National Pipe Thread (NPT) Conduit (6 ft Cable Attached)
621/622 Series Explosion-Proof Pressure Transmitters

0 to 10,000 psig, 0.25% Accuracy (Best Fit Straight Line (BFSL), 1 to 5 Vdc Output, 1/2" National Pipe Thread (NPT) Male Explosion-Proof Pressure Transmitter with 1/2" National Pipe Thread (NPT) Potted Conduit (6 ft Flying Leads)
Type N/A Pressure Transmitter
Connection Type N/A Male National Pipe Thread (MNPT)
Weight N/A 12 oz
Storage Temperature [Min] N/A -40 ºC221 ºF
Storage Temperature [Max] N/A -40 ºC105 ºF
Housing Material N/A 316 Stainless Steel
Connection Size N/A 1/4 in N/A 1/4 in N/A 1/2 in N/A 1/4 in N/A 1/2 in
Accuracy N/A 0.25 %
Output Signal N/A 4 mA to 20 mA, 2-wire N/A 4 mA to 20 mA, 2-wire N/A 4 mA to 20 mA, 2-wire N/A 1 Vdc to 5 Vdc, 3-Wire, Low Power N/A 1 Vdc to 5 Vdc, 3-Wire, Low Power
Electrical Connection N/A 1/2 in. NPT male conduit with 6 ft integral cable N/A 1/2 in. NPT male conduit with 6 ft integral cable N/A 1/2 in. NPT male conduit with 6 ft integral cable N/A 1/2 in. NPT male conduit with 6 ft integral cable N/A 1/2 in. NPT male conduit with 6 ft flying leads with epoxy seal
Environmental Rating N/A Ingress Protection (IP67)
Series N/A Stainless Steel Threaded Connection
Connection Material N/A 316 Stainless Steel
Pressure Range N/A 0 to 10,000 psig
Absolute Pressure Range N/A 0 to 100 psia0 to 15 psia
Stability N/A ≤ ±0.2% full scale for 1 year, non-accumulating
Response Time N/A ≤1 ms
Service Life N/A > 100,000,000 Load Cycles
Compensated Temperature Range N/A 32 to 176 ºF0 to 80 ºC
Media Temperature Range (T6) N/A -40 to 131 ºF-40 to 55 ºC
Media Temperature Range (T5) N/A -40 to 158 ºF-40 to 70 ºC
Media Temperature Range (T4) N/A -40 to 212 ºF-40 to 100 ºC
Ambient Temperature Range (T6) N/A -40 to 140 ºF-40 to 60 ºC
Ambient Temperature Range (T5) N/A -40 to 167 ºF-40 to 75 ºC
Ambient Temperature Range (T4) N/A -40 to 221 ºF-40 to 105 ºC
Power Requirement N/A 10 Vdc to 30 Vdc (4 mA to 20 mA, 2-wire)
6 Vdc to 30 Vdc (1 Vdc to 5 Vdc, 3-wire, 0.5 Vdc to 4.5 Vdc, 3-wire)
14 Vdc to 30 Vdc (0 Vdc to 10 Vdc, 3-wire)
Current for 4 to 20 Milliampere (mA) N/A 0.020 A
Resistance for 1 to 5 Direct Current (DC) Voltage, 3-Wire N/A ≥ 10,000 O
Measuring Element N/A 621 Series is 316 stainless steel for ranges up through 0 psi to 300 psi, 316 stainless steel with Elgiloy ranges 0 psig to 500 psig and higher
Electrical Protection N/A Reverse polarity, over-voltage and short circuit protected
Electromagnetic Rating N/A European Conformity (CE) Compliant to Electromagnetic Compatibility (EMC) Norm European Standards (EN) 61326:2014/A1:1998, Radio Frequency Interference (RFI), Electromagnetic Interference (EMI) and Electrostatic Discharge (ESD) Protection
Shock According to International Electrotechnical Commission (IEC) 60068-2-27 N/A 1,000 g
Vibration According to International Electrotechnical Commission (IEC) 60068-2-6 N/A 20 g
Options N/A N/A Threaded Orifice N/A N/A N/A
Application N/A
  • Chemical processing
  • Gas pressure measurement
  • Oil field & offshore
  • Mining
  • Well head measurement
Additional Information N/A NOSHOK 621 and 622 Series transmitters are Factory Mutual and Canadian Standards Association approved for use in hazardous location applications as follows:
  • Explosion-proof with entity approved for: Class I, Division 1, Groups A, B, C and D.
  • Dust Ignition-proof with entity approval for class II/III, Division 1, Groups E, F and G.
  • Maximum electrical ratings 30V, 20 mA.
  • CE compliant with pressure equipment directive 2014/68/EU.
  • ANSI/ISA-12.27.01, Approved single seal.
Options and Accessories N/A
  • SS Threaded Orifice - 621 Only (ST8)
  • 20 foot cable/lead - attached to 1/2" NPT Male Conduit w/ 6 foot integral cable or 1/2" NPT Male Conduit w/ 6 foot flying lead and epoxy seal (20)
  • 30 foot cable/lead - attached to option 6 or 37 (30)
Assembly Option for Indication, Output, and Isolation/Bleed N/A NOSHOK offers multiple assembly options to meet your specific system requirements. Consult factory to discuss your customized solution.

For example, you can simplify your system with this easy-to-install solution from NOSHOK. Three simple components that require a single threaded connection in your piping system will provide local indication, analog output and block/isolate with bleed function. This product grouping is an ideal solution for a variety of applications including oil and gas, and is available in several high pressure ranges, including 5,000, 10,000 and 15,000 psi. Special design for Shale Gas applications.

This example represents a general solution; however, we offer a diverse range of gauges, transmitters and valves which are available with a variety of connection options and ranges to suit your needs. (Photo shows 40-400 Series Pressure Gauge (Local Indication), 621 Series Pressure Transmitter (Control Output), and 200 Series Multi-Port Valve (Block/Isolate & Bleed).
Digital Indicators N/A NOSHOK Digital Indicators provide local indication for pressure, level and temperature transmitters.
Pressure Snubbers - Piston Type N/A
  • Resist clogging and are self-cleaning
  • Five different sized pistons included with each snubber to ensure the correct amount of snubbing for virtually every application
  • Available in Brass and 316 Stainless Steel in 1/4" NPT, 1/2" NPT or SAE J1926-3: 7/16-20
  • Weight approximately 0.2 lb. for 1/4" & 7/16", and approximately 0.4 lb. for 1/2"​​​​​​
Pressure Snubbers - Sintered Type N/A
  • Cost effective solution to protect expensive instrumentation
  • Increases gauge readability by smoothing out pressure surges, pulsations and spikes
  • 5 basic elements available for each snubber to accommodate specific application needs
  • Snubbing action achieved by utilizing a corrosion resistant 316 Stainless Steel sintered porous element
  • Exotic materials or intermediate disc grades available
  • Provides long service life with no moving parts to wear out
  • Weight approximately 0.2 lb. for 1/4" & 7/16", and approximately 0.4 lb. for 1/2
Steam Syphons N/A
  • Protect the instrument from the damaging effects of high temperature steam
  • Recommended for use in all steam applications
  • Available in 1/4" and 1/2" NPT sizes in welded steel, welded 316 Stainless Steel or seamless 316 Stainless Steel with ratings to 3,800 psi at 850 ºF
Swivel Adapters N/A
  • Temperature ratings: 15,000 psi at 200 ºF and 3,000 psi at 1,000 ºF
  • Used with gauges and gauge valves to adjust the line of sight
  • Rotates 360º to allow the connected instrument to be positioned in the desired direction
  • The pressure connection is achieved with a tapered cone style compression fitting simply by tightening the swivel hex nut
  • All 316 Stainless Steel construction
  • Standard with 1/2" NPT male process - 1/2" NPT female instrument connections
  • Also available with 1/4" NPT connections, same specifications apply
  • Weight approximately 0.8 lb.
Prop 65 Warnings N/A
WARNING: This product can expose you to chemicals including Lead and Nickel, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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