https://assets.omega.com/pdf/test-and-measurement-equipment/pressure/manometers/HHP351.pdf

SPECIFICATIONS
Accuracy:
    HHP351: ±0.05% FS (except
    HHP351-A: ±0.1% FS)
    HHP352: ±0.025% FS
Storage Temperature: -5 to 50°C (23 to 122°F)
Operating Temperature: -40 to 60°C (-40 to 140°F)
Temperature Effects: No temperature effect over the entire operating range
Engineering Units: Inches of H₂O [select 4°C, 20°C, 60°F], psi, mm of Hg, cm of Hg, inches of Hg, mBars, Bars, kPa, kg/cm², and user selectable scaling
Proof Pressure: 2x range on gage and absolute units, 2x range on differential units when pressurized on high side only and 10.3 bar (150 psi) static when applied to both sides of the sensor simultaneously
Pressure Port: 1/8 NPT-F
Media Compatibility: Differential clean, dry non-corrosive gases only, gage or absolute models for fluids compatible with 316L SS
Battery: 4 "AA" batteries (included)
Battery Life: >100 hours continuous
Dimensions: 165 H x 91 W x 57 mm D (6.5 x 3.6 x 2.25")
Weight: 400 g (14 oz)