SPECIFICATIONS
Service: Air and compatible gases. FM models: air and compatible combustible gases.
Wetted Materials: Consult Factory.
Accuracy: ±0.5% F.S., 60 to 78°F (15.6 to 25.6°C); ±1.5% F.S. from 32 to 60°F and 78 to 104°F (0 to 15.6°C and 25.6 to 40°C).
Pressure Hysteresis: ±0.1% of full scale.
Pressure Limits: See chart on "Ordering" page.
Temperature Limits: 0 to 140°F (-17.8 to 60°C).
Compensated Temperature Limits: 32 to 104°F (-0 to 40°C).
Storage Temperature Limits: -4 to 176°F (-20 to 80°C).
Display: 0.42" (10.6 mm) 4-digit LCD.
Response Time: 1 second.
Resolution: See chart on "Ordering" page.
Power Requirements: 9 volt alkaline battery. Battery included but not connected.
Weight: 10.2 oz (289 g).
Connections: Two barbed connections for use with 1/8" (3.18 mm) or 3/16" (4.76 mm) I.D. tubing. Two compression fittings for use with 1/8" (3.18 mm) I.D. x 1/4" (6.35 mm) O.D. tubing for 477-7-FM & 477-8-FM only.
Agency Approvals: CE and FM, USB models are not FM approved intrinsically safe.

PRESSURE UNITS AVAILABLE

Model Number	bar	psi	in Hg	kPa	in w.c.	mm Hg	mbar	mm w.c.	Pa
477-000-FM			.0736	.2491	1.000	1.868	2.491	25.40	249.1
477-00-FM		.1445	.2942	0.996	4.000	7.473	9.96	101.6	996
477-0-FM		.3613	.7355	2.491	10.00	18.68	24.91	254.0	2491
477-1-FM	.0498	.7225	1.471	4.982	20.00	37.36	49.82	508.0	4982
477-2-FM	.0996	1.445	2.942	9.96	40.00	74.73	99.6	1016	9964
477-3-FM	.4982	7.225	14.71	49.82	200.0	373.6	498.2	5080
477-4-FM	.6895	10.00	20.36	68.95	276.8	517.1	689.5	7031
477-5-FM	1.379	20.00	40.72	137.9	553.6	1034	1379
477-6-FM	2.069	30.00	61.08	206.9	830.4	1551	2069
477-7-FM	6.895	100.0	203.6	689.5	2768	5171	6895
477-8-FM	10.34	150.0	305.4	1034	4152	7757