1-1/16 [26.98] BARBED FOR 1/8 OR 3/16 I.D. TUBING 475-7 & 475-8 ONLY; 1/8 I.D. X 3/16 O.D. TUBING 2-13/16 [71.44] 29/32 [23.02] 5/8 [15.88] 5-7/8 [149.23] INTRINSICALLY SAFE HANDHELD DIGITAL MANOMETER Ranges from 1 in w.c. to 150 psid, ±0.5% Accuracy The Series 475 Intrinsically Safe Handheld Digital Manometer measures positive, negative, or differential pressures of air and natural gases in ranges from 1 in w.c. (0.249 kPa) to 150 psid (10.34 bar). The dual push pads on the front panel control the on/off, auto zero, and pressure unit selection, allowing for simple operation with no set up needed. When used with a Dwyer ® Pitot tube ( u ), the Series 475 can also be used as an air velocity gage. FEATURES/BENEFITS • Rugged aluminum case protects instrument from damage during transport/use • Large, easy to read LCD and simple operation • FM approved to be intrinsically safe in hazardous locations, Class 1, Div 2, Groups A, B, C, D, T4 Ta = 70°C APPLICATIONS • Monitoring natural gas pressures on boilers and other combustion equipment • Air velocity monitoring, when used with a Dwyer ® Pitot tube ( u ) and AV calculator • Field calibration of other instruments • Monitoring or troubleshooting HVAC systems SPECIFICATIONS Service: Air and compatible combustible gases. Wetted Materials: Consult factory. Accuracy: ±0.5% FS, 60 to 78°F (15.6 to 25.6°C); ±1.5% FS 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% FS. Pressure Limits: See chart. 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. Resolution: See chart. Power Requirements: 9 V alkaline battery, installed non-functional, user replaceable. Weight: 10.8 oz (306 g). Process Connections: Two barbed connections for use with 1/8˝ (3.18 mm) or 3/16˝ (4.76 mm) ID tubing. Two compression fittings for use with 1/8˝ (3.18 mm) ID x 1/4˝ (6.35 mm) OD tubing for 475-7 & 475-8 only. Agency Approvals: CE, FM approved to Class I, Div 2, Groups A, B, C, D, T4 Ta = 70°C. A-402AUHH-C1 u Pitot tube: See pages 201-234 (Air Quality section) Process Tubing Options: See page 453 (Gage Tubing Accessories) -AV option 475-AV air velocity kit A-47X-BOOT (manometer not included) SERIES 475 DWYER INSTRUMENTS, INC. | dwyer-inst.com172 Manometers, Portable TEST & DATA OPTIONS To order add suffix:Description -AVAir velocity kit, includes the Series 475 manometer, two A-303 static pressure tips two 9´ lengths 3/16˝ ID rubber tubing, no. 166-6-CF pitot tube, A-397 step drill, A-532 air velocity slide chart and instruction bulletin H-11, all packed in a tough, molded plastic carrying case with die cut foam liner. Examples: 475-1-AV; 475-000-AV -NISTNIST traceable calibration certificate Example: 475-1-NIST MODEL CHART ModelEnglish RangeMetric RangeMaximum Pressure 475-000-FM 475-00-FM 475-0-FM 475-1-FM 475-2-FM 475-3-FM 475-4-FM 475-5-FM 475-6-FM 475-7-FM 475-8-FM 0 to 1.000 in w.c. 0 to 4.000 in w.c. 0 to 10.00 in w.c. 0 to 20.00 in w.c. 0 to 40.00 in w.c. 0 to 200.0 in w.c. 0 to 10.00 psi 0 to 20.00 psi 0 to 30.00 psi 0 to 100.0 psi 0 to 150.0 psi .2491 kPa 0.996 kPa 2.491 kPa 4.982 kPa 9.96 kPa 49.82 kPa .6895 bar 1.379 bar 2.069 bar 6.895 bar 10.34 bar 5 psig 5 psig 5 psig 10 psig 10 psig 30 psig 30 psig 60 psig 60 psig 150 psig 200 psig ACCESSORIES ModelDescription A-402A UHH-C1 A-47X-BOOT Carrying case, tough gray nylon pouch protects any Series 475 manometer, double zippered for quick and easy access, belt loop that snaps closed, 7-1/2˝H x 3˝W x 2-1/4˝D (191 x 76 x 57 mm) Soft carrying case Protective magnetic rubber boot TestData_2021.indb 1727/15/20 2:11 PMNext >