User Manual PRESSURE TRANSMITTERS Series 621 and 622 Explosion-proof (Factory Mutual and Canadian Standards Association Approved) FM APPROVED ® © NOSHOK US
General NOSHOK series 621 and 622 pressure transmitters are approved for use in hazardous location applications as follows: Explosion-proof for Class I, Division 1, Groups A, B, C and D; Dust Ignition-proof for Class II and III, Division 1, Groups F and G. FM standards according to FMRC 3600, 3615 and 3810 and 3810. ANSI/ISA-12.27.01-2003 Approved single seal. These transmitters must be installed and operated according to NEC and local codes.
NOSHOK series 621 and 622 explosion-proof pressure transmitters require no maintenance. They are calibrated at the factory using pressure standards traceable to N.I.S.T. There are no user available adjustments.
1/2″ NPT Male conduit 3.60″ (91.4mm) 3.60″ (91.4mm) 1.06″ (26.9 mm) 1/4″ NPT Male .50″ (12.7mm) 1/2″ NPT Male conduit 1/2″ NPT Male conduit 3.60″ (91.4mm) 1.06″ (26.9 mm) 1/2″ NPT .50″ (12.7mm) Male .75″ (19.1mm) For ranges 0 psi to 30 psi and higher 1.61" (41mm) O-ring .73" x .94" x .08" (18.5mm x 23.9mm x 1.5mm) .81" (20.5mm) . .81" (20.5mm) 1/4″ NPT Male For ranges less than 0 psi to 30 psi 1.06" (27mm) .39" (10mm) 1.06″ (26.9 mm) O-ring O 1.17" x 1.41" x .08" (29.7mm x 35.7mm x 2.
