REED R3100 Digital Manometer, Gauge / Differential, 100psi


This digital manometer provides accurate measurements in 11 different units of measure and is capable of taking gauge and differential pressure. The R3100 features a large backlit LCD display and internal memory to capture maximum and minimum measurements.


  • Measures gauge and differential pressure up to 100psi
  • 11 selectable units of measure: psi, inH2O, bar, mbar, kPa, inHg, mmHg, ozin², ftH2O, cmH2O, kgcm²
  • Displays pressure and real-time clock simultaneously
  • Large, easy-to-read backlit LCD display
  • Internal memory saves Max and Min measurements
  • Data hold function
  • Low battery indicator and auto shut off


Measuring Ranges100.0 psi
2768 inH2O
6895 mbar
203.6 inHg
5171 mmHg
1600 ozin²
230.7 ftH2O
7004 cmH2O
7.031 kgcm²
6.895 bar
Accuracy±0.3% FS
Resolution0.1 psi
2 inH2O
4 mbar / cmH2O
0.4 kPa
0.2 inHg
3 mmHg
1 ozin²
0.2 ftH20
0.004 kg/cm² / bar 
Repeatability±0.2% FS
Linearity/Hysteresis±0.29% FS
Max Pressure150 psi
General Specifications
Display4-digit, Dual LCD Display
Backlit DisplayYes
Data HoldYes
Differential PressureYes
Response Time2 times/sec.
Internal MemoryYes
Auto Shut-offYes (after 20 mins/off)
Low Battery IndicatorYes
Power Supply9V battery
Product CertificationsCE
Operating Temperature32 to 122°F (0 to 50°C)
Storage Temperature14 to 140°F (-10 to 60°C)
Operating Humidity10-80%
Dimensions7.2 x 2.8 x 1.2" (182 x 72 x 30mm)
Weight7.8 oz (220g)