Product Description
Series HM35 Ultra-Precision Digital Differential Pressure Manometer – 0–28″ w.c.
The Series HM35 digital differential pressure manometer is engineered for laboratories, industrial hygiene programs, and HVAC commissioning teams that require high-resolution low-pressure measurement with traceable documentation. Covering a 0–28 inches-of-water-column range with ±0.10% full-scale accuracy, this model supports absolute, differential, and gauge pressure modes while capturing pressure trends through integrated data logging.
Each instrument ships with a calibration certificate, allowing it to function as a dependable secondary calibration reference for validating airflow instruments, regulators, pressure transmitters, and controlled-environment systems.
Pressure Range & Instrument Specifications
• Pressure Range: 0–28″ w.c.
• Accuracy Tier: ±0.10% FS + 1 digit (per order code)
• Media: Air and compatible gases
• Wetted Materials: 18/8 stainless steel
• Display: Graphical backlit LCD (128 × 64)
• Memory: 10,742 readings
• Logging Interval: 1 second to 24 hours or manual
• Power: (3) AA batteries or 6–9 VDC external
• Ingress Protection: IP54 / NEMA 3
• Pressure Ports: 4/6 mm hose or 1/8″ NPT
• Approvals: CE
Why Professionals Choose the HM35
✔ Ultra-precise low-pressure measurement
✔ Data logging with PC download
✔ Graphical trend display
✔ Secondary calibration reference capability
✔ Rugged IP54 enclosure
✔ Battery or external power operation
