Product Description
Ultra-Precision Digital Differential Pressure Manometer – 0–14.5 PSI
The Series HM35 ultra-precision digital differential pressure manometer is engineered for industrial hygiene programs, laboratory environments, and calibration facilities requiring reliable traceable pressure measurement with onboard documentation. This model supports absolute, differential, and gauge pressure modes and provides ±0.20% full-scale accuracy while capturing long-term pressure trends using internal data logging.
Each unit ships with a calibration certificate, enabling use as a secondary calibration reference when validating transmitters, regulators, and airflow instrumentation.
Pressure Range & Instrument Specifications
• Pressure Range: 0–14.5 PSI
• Accuracy Options (per order code):
– ±0.20% FS + 1 digit (HM3531DLH300)
– ±0.10% FS + 1 digit
– ±0.05% FS + 1 digit
• 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
This HM35 digital manometer stores more than 10,700 readings internally, allowing hygienists and technicians to track pressure stability, capture transient events, and maintain calibration documentation for compliance programs. Data transfers easily to a PC through the instrument’s infrared interface.
The large graphical LCD visualizes pressure trends, peak values, and valleys in real time — making it ideal for ventilation diagnostics, duct verification, fume hood balance testing, and laboratory troubleshooting.
Applications
• Industrial hygiene programs
• Calibration laboratories
• Ventilation system testing
• Research facilities
• HVAC diagnostics
• Pressure transmitter verification
• QA and compliance programs
Why Professionals Specify the HM35 Series
✔ ±0.20% FS accuracy option
✔ Absolute, differential, and gauge modes
✔ Secondary calibration reference capability
✔ Onboard data logging with PC export
✔ Graphical trend visualization
✔ Stainless steel wetted components
✔ IP54 enclosure
✔ Battery or external power operation
