189B 30PSI Digital Differential Pressure Gauge HVAC ±0.3%FS Dual Port Manometer for Gas Pressure Tester Backlight Data Hold

HOLDPEAK HP-189B Professional Digital Differential Pressure Gauge for HVAC & Industrial Use

This high-precision digital pressure meter is designed for measuring differential, positive, and negative pressure with 11 selectable units (inH₂O, psi, bar, mbar, kPa, inHg, mmHg, oz/in², ftH₂O, cmH₂O, kg/cm²). Ideal for HVAC systems, ventilation checks, gas pressure troubleshooting, and scientific research.

Key Features:

High Accuracy: ±0.3% FS with ±0.1% linearity/hysteresis.

Multi-Function Display: Shows real-time pressure, max/min/avg values, data hold, and low battery warning.

Wide Range: Supports ±30 psi (max) with overload protection (ERR1/ERR2 alerts).

User-Friendly: Backlit screen, 25-minute auto shutoff, and lightweight (134g) for portability.

Easy Calibration: Long-press zero reset function for accurate measurements.

Category          Specifications  

Measurement             Differential, Positive, Negative Pressure

Units                     inH₂O, psi, bar, mbar, kPa, inHg, mmHg, Ozin², ftH₂O, cmH₂O, kg/cm²

Ranges                     ±830 inH₂O, ±30.00 psi, ±2068 mbar, ±206.8 kPa, ±1551 mmHg, etc. (See full table)

Resolution             0.01~1 (varies by unit)

Accuracy                    ±0.3% Full Scale (FS)

Max Pressure             30 PSI (Safety Limit)

Display                       LCD with Backlight, HOLD, MAX/MIN/AVG, Low Battery Alert

Power                   2x AAA Batteries (Auto-Off: 25 mins)

Connector          1/8" (3.18mm) Quick-Connect Port

Dimensions          160 x 62 x 31 mm / 134g

Operating Temp        0°C ~ 40°C

Package Includes:

● 1x Digital Pressure Gauge

● 1x Quick-connect adapter (1/8")

● 1x User manual