Patent No. 4,385,525

POPULAR MODELS

Model Number	Description
603A-1	Differential pressure transmitter, range (as stocked) 0-0.25" w.c. (6.34 mm), min. 0-0.20" w.c. (5.08 mm), max. 0.50" w.c. (12.77 mm), max. pressure 25 psi (1.7 bar), ±2% electrical accuracy.
603A-2	Differential pressure transmitter, range (as stocked) 0-0.50" w.c. (12.7 mm), min. 0-0.50" w.c. (12.7 mm), max. 0-1.50" w.c. (38.1 mm), max. pressure 25 psi (1.7 bar), ±2% electrical accuracy.
603A-3	Differential pressure transmitter, range (as stocked) 0-2.0" w.c. (50.8 mm), min. 0-1.5" w.c. (38.1 mm), max. 0-5.0" w.c. (127 mm), max. pressure 5 psi (34.5 kPa), ±0.5% electrical accuracy.
603A-4	Differential pressure transmitter, range (as stocked) 0-5.0" w.c. (127 mm), min. 0-4.0" w.c. (101.6 mm), max. 0-15" w.c. (381 mm), max. pressure 5 psi (34.5 kPa), ±0.5% electrical accuracy.
603A-5	Differential pressure transmitter, range (as stocked) 0-25" w.c. (634 mm), min. 0-10" w.c. (254 mm), max. 0-60" w.c. (1522 mm), max. pressure 20 psi (1.4 bar), ±0.5% electrical accuracy.
603A-6	Differential pressure transmitter, range (as stocked) 0-100" w.c. (2540 mm), min. 0-50" w.c. (1264 mm), max. 0-250" w.c. (6445 mm), max. pressure 20 psi (1.4 bar), ±0.5% electrical accuracy.
603A-11	Differential pressure transmitter, range .25-0-.25" w.c. (12.7 mm), max. pressure 25 psi (1.7 bar), ±2% electrical accuracy.
603A-12	Differential pressure transmitter, range 1-0-1" w.c. (50.8 mm), max. pressure 5 psi (34.5 kPa), ±0.5% electrical accuracy.
603A-13	Differential pressure transmitter, range 5-0-5" w.c. (254 mm), max. pressure 5 psi (34.5 kPa), ±0.5% electrical accuracy.
603A-14	Differential pressure transmitter, range 10-0-10" w.c. (208 mm), max. pressure 20 psi (1.4 bar), ±0.5% electrical accuracy.

ACCESSORIES

Model Number	Description
A-298	Flat aluminum flush mounting bracket.
A-370	Mounting bracket.
A-277	Precision resistor, 250 ohm.
A-276	Precision resistor, 500 ohm.