Product Description
Ultra-Precision Digital Differential Pressure Manometer – 0–14.5 PSI
The Series HM35 ultra-precision digital differential pressure manometer is built for industrial hygiene programs, calibration laboratories, and research environments requiring maximum measurement confidence and documented traceability. This configuration delivers ±0.05% full-scale accuracy, supporting absolute, differential, and gauge pressure modes while capturing pressure trends through integrated data logging.
Each instrument includes a calibration certificate, allowing it to serve as a secondary calibration reference when validating transmitters, regulators, airflow instruments, and ventilation systems.
Pressure Range & Instrument Specifications
• Pressure Range: 0–14.5 PSI
• Accuracy Options (per order code):
– ±0.20% FS + 1 digit
– ±0.10% FS + 1 digit
– ±0.05% FS + 1 digit (HM3531DLH100)
• Media Compatibility: Air and compatible gases
• Wetted Materials: 18/8 stainless steel
• Operating Temperature: 32 to 122°F (0 to 50°C)
• Storage Temperature: –4 to 140°F (–20 to 60°C)
• Humidity: 95% RH max, non-condensing
• Display: Graphical backlit LCD, 128 × 64 resolution
• Memory Capacity: 10,742 readings
• Recording Interval: 1 second to 24 hours or manual
• Power Supply: (3) AA batteries or 6–9 VDC external
• Current Draw: 25 mA (without backlight, IR, or buzzer)
• Ingress Protection: IP54 / NEMA 3
• Weight: 10.5 oz (270 g)
• Pressure Connections: 4/6 mm hose or 1/8" NPT
• Approvals: CE
Integrated Data Logging & Graphical Trend Display
With onboard memory for more than 10,700 readings, this HM35 manometer enables technicians to capture pressure stability, diagnose system fluctuations, and maintain audit-ready calibration records. Data downloads easily to a PC through the infrared interface.
The large graphical LCD presents live trend plots, peak values, and valleys — ideal for ventilation surveys, duct balance testing, fume hood verification, and laboratory diagnostics.
Applications
• Industrial hygiene monitoring programs
• Calibration laboratories
• Ventilation system testing
• Research facilities
• HVAC diagnostics
• Pressure transmitter verification
• QA and compliance operations
Why Professionals Specify the HM35 Series
✔ Ultra-precision ±0.05% FS accuracy
✔ Absolute, differential, and gauge pressure modes
✔ Secondary calibration reference capability
✔ Onboard data logging with PC export
✔ Graphical trend visualization
✔ Stainless steel wetted components
✔ IP54 enclosure for lab or field use
✔ Battery or external power operation
