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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.

635 Dual Differential Input Manometer


  • 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

Product Documentationpdf-icon1

Click below to view or download product documentation PDFs:

635-645-655 Instruction Manual

635 Data Sheet

£165.00 RRP exc. VAT 

Where to Buy TPI Products

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
• TPI 645 30 PSI pressure range
• TPI 655 100 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).

 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 Selection
 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

TPI Model 635 Introduction Video

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