Digital Manometer, 0-40" H&sub2;O Range, Hi-Vol Sampler Calibration SKU: TE-475-2

The TE-475-2 Digital Manometer delivers precise pressure measurements essential for calibrating high-volume air samplers according to EPA protocols. This handheld instrument measures positive, negative, or differential pressures from 0 to 40.00 inches of water column (9.96 kPa), making it ideal for flow verification and calibration of TSP, PM10, and PM2.5 sampling systems.

Precision Measurement for EPA Compliance

The manometer provides ±0.5% full scale accuracy at temperatures from 60-78°F and ±1.5% full scale accuracy from 32-60°F and 78-104°F. The large 4-digit LCD display shows readings with 0.01" H&sub2;O resolution, ensuring you can detect small pressure changes critical for accurate flow measurements. Dual push-pad controls manage power, auto-zero function, and unit selection between U.S. and metric readings.

Key Specifications

• Pressure Range: 0 to 40.00" H&sub2;O (0 to 9.96 kPa)
• Accuracy: ±0.5% FS (60-78°F), ±1.5% FS (32-60°F, 78-104°F)
• Resolution: 0.01" H&sub2;O
• Display: 4-digit LCD, 0.42" tall digits
• Power: 9V alkaline battery (100+ hours operation)
• Process Connections: Dual barbed fittings for 1/8" or 3/16" ID tubing

Universal Hi-Vol Sampler Compatibility

Compatible with all Tisch Environmental high-volume air samplers and most other manufacturers' systems. Standard hose-barb connections accept 1/8" or 3/16" ID vinyl or rubber tubing for direct connection to sampler pressure taps. Use this manometer to verify flow rates during mass flow controller (MFC) calibration procedures where exit orifice plenum pressure measurements are required.

Safety and Durability Features

FM-approved intrinsically safe for Class I, Division 1, Groups A, B, C, D, T4 hazardous locations, making it suitable for use around combustible gases. The rugged aluminum housing protects internal electronics during field use, while the auto-shutoff function conserves battery life by turning off the unit after 20 minutes of inactivity.

EPA Method Applications

Essential for compliance with 40 CFR Part 50, Appendix B (TSP sampling), 40 CFR Part 50, Appendix J (PM10 sampling), and 40 CFR Part 50, Appendix L (PM2.5 sampling). Digital manometers used for EPA compliance work should receive annual factory calibration to maintain measurement traceability.