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635 Dual Input Tuffman up to 5psi (344 mBar) Digital Manometer


Dual Differential Input Manometer with ±5 psi range and 0.001 psi resolution. Seven units of pressure: inH2O, mbar, KPa, PSI, mH2O, mmHg, inHg, Auto power off, Record/Min/Max, Backlight display, Zero function, Trim mode to stabilize readings.

In stock


Dual Differential Input Manometer with ±5 psi range and 0.001 psi resolution. 

  • Differential input with +/- 5 PSI range
  • Seven units of measure (mbar, kPa, PSI, mmHg, inHg, mH2O, inH2O)
  • Display – 4 digit with backlight
  • Smooth – Stabilizes display when measuring fluctuating pressures
  • Data Hold – Freezes reading on display
  • Min / Max – Records Min/Max readings
  • Auto Off: Conserve battery power

The TPI 600 Tuffman series is a hand held range Of pressure meters and can be summarized as follows:

• TPI 635 5 PSI pressure range (this model)
TPI 645 30 PSI pressure range

All of these models are dual input differential pressure meters with 7 selectable scales to choose from: mbar, kPa, PSI, inHg. mmHg,inH20, and mH20.

Standard Accessories (Included): 9V alkaline battery (A009A), replacement tubing (A601).


Product Documentationpdf-icon1

Click below to view or download product documentation PDFs:

635-645-655 Instruction Manual

635 Data Sheet


 Model 635 Specifications
 Measurement Range +/- 5 psi
 Display 4 Digit Dual line LCD with backlight
 Input Type Dual Differential (compression fittings)
 Resolution (max) 0.001 psi
 Accuracy +/-(0.1% Full scale + 3 digits)
 Functions One Touch Zero, Data Hold, Back-light, Unit Selection,
Smoothing, Auto power Off,Min / Max Record, Resolution
 Units of Measure 7 Units (mbar, kPa, PSI, mmHg, inHg, mH2O, inH2O)
 Battery Type 9V Alkaline
 Battery Life 80 hours (Typical)
 Auto Power Off 30 minutes
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