Reference only — this item is no longer available. This product has been discontinued and cannot be ordered. We keep the page online so the specifications and documentation stay available to anyone still running the equipment. Current replacements are listed further down.

Discontinued

Manometer Digital 13.85" WC [-0.5 to 0.5 psi] (HD755) with Software

Reference only — not for sale

Model	HD755
Manufacturer	Extech
Category	Manometers
Status	Discontinued

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Product details (archived)

The information below is retained for reference only. This item is discontinued and cannot be ordered.

HD755 Low Range High Resolution Gauge or Differential Pressure Manometer.

11 selectable units of measure
Max/Min/Avg recording with elapsed timer and relative time stamp
Data Hold functions
Large LCD display with backlighting
Zero function for offset correction or measurement
Built-in USB port (software and cable included)
Auto power off after 20 minutes (can be disabled)
Low battery indication
Threaded tripod mount

Specifications:

	Range	Resolution
in h₂o	±13.85	0.01
psi	±0.500	0.001
mbar	±34.47	0.01
kPa	±3.447	0.001
in HG	±1.018	0.001
mm HG	±25.86	0.01
oz in²	±8.00	0.01
ft h₂o	±1.154	0.001
cm h₂o	±140.6	0.1
kg cm²	±0.035	0.001
bar	±0.034	0.001

Accuracy: ±0.3% FS + 1 digit
Repeatability: ±0.2% to 0.5% FS
Linearity/Hysteresis: ±0.3%FS
Maximum pressure: 2psi
Sample rate: 0.5 seconds typical
Compatibility: air or non-corrosive and non-ionized gas (not intended for liquids)
Input Ports: 2 metal 4.8mm, barbed for 1/8" (3.17mm) ID tubing
Display: four digit LCD with Function Indicators
Battery power: (1) 9v battery (included)
Battery life: ~125 hours typical
Operating temperature range: 32° to 122° F (0° to 50° C)
Operating humidity range: <80% RH
Storage temperature range: 14° to 140° F (0° to 60° C)
Storage humidity range: <80% RH
Dimensions: 8.2" x 2.9" x1.9" (210 x 75 x 50mm)
Weight: 9.8 (280g)