1. Home
    2. testo 312-4

    testo 312-4 - Differential pressure measuring instrument up to 200 hPa

    0632 0327
  1. Tightness testing and load testing on gas pipes
  2. Serviceability testing with air by pressure drop on gas pipes
  3. Pressure testing on drinking water and waste water pipes using air
  4. Automatic recording of measuring values over several hours
    5. Differential pressure gauge testo 312-4
    A measuring instrument for carrying out all necessary tests on gas heaters and pipes as well as water pipes. Inherently safe thanks to the use of C-Flex hoses with high impermeability. Legally compliant measurement procedure for pre-test, main test and leakage quantity measurement on gas pipes. Recording of measurement values over a defined period (e.g. 24 h) and data transfer and analysis on PC software incl. graphic presentation.

    testo 312-4 differential pressure measuring instrument, including battery and calibration protocol.

    Temperature - Type K TC

    Measuring range
    dependent on probe type used
    Accuracy
    ±0.7 °F (-148° to 392 °F)* / ±0.4 °C (-100 to +200 °C)*
    ±2 °F (Remaining Range)* / ±1 °C (Remaining Range)*
    Resolution
    0.01 °F t1 / 0.01 °C
    *Accuracy information applies only to instrument without probes connected

    Differential pressure (internal sensor)

    Measuring range
    0 to 80 InHâ‚‚O / 0 to 200 hPa
    Accuracy
    ±1 InH₂O or ±1 % of full-scale value (16 to +80 InH₂O) / ±2 hPa or ±1 % of fsv (41 to +200 hPa)
    ±0.01 InH₂O (0 to +1 InH₂O) / ±0.03 hPa (0 to +3 hPa)
    ±1.5 % of mv (+1.2 to +16 InH₂O) / ±1.5 % of mv (+3.1 to +40 hPa)
    Resolution
    0.01 InHâ‚‚O / 0.01 hPa

    Pressure measurement (external probe)

    Measuring range
    0 to 363 psi / 0 to 25 bar
    Accuracy
    ±0.6 % of full-scale value (>145 to 363 psi) / ±0.6 % of fsv (>10 to 25 bar)
    ±0.6 % of full-scale value (0 to 145 psi) / ±0.6 % of fsv (0 to 10 bar)
    Resolution
    4 InHâ‚‚O / 10 hPa

    Accessories

  5. Accessories
    RS232 cable
      :
      0409 0178
      $ 104.00
    • Accessories
      Connection cable
      Connection cable.
        :
        0430 0143
      • Accessories
        9V rech. battery for instrument
        9V rechargeable battery for instrument
          :
          0515 0025
        • Accessories
          TopSafe
          TopSafe (protective case)
            :
            0516 0446
          • Accessories
            testo 320-330 case
            System case (height: 130 mm) for instrument, probes and accessories
              :
              0516 3300
              $ 152.00
              1
            • Accessories
              Pressure set
              Pressure connection hose, single, diameter: 4/6 mm, 50 cm long, without connection adapter
                :
                0554 0449
              • Accessories
                testo-Schnelldrucker IRDA mit kabelloser Infrarot-Schnittstelle
                Compact printer, with IRDA technology offers fast, easy to read printouts of measurements at every job site.  Internal magnets will hold the printer to magnetic surfaces for hands free operation. *Compatible with any Testo device capable of IR or IRDA
                  :
                  0554 0549
                  $ 356.15
                  1
                • Accessories
                  Spare thermal paper
                  Spare thermal paper, permanent ink
                    :
                    0554 0568
                    $ 39.10
                    1
                  • Accessories
                    Desk-top power supply
                    Power supply for compact gas drier and flue gas analyzer
                      :
                      0554 1143
                      $ 182.00
                      1
                    • Accessories
                      Conical test stop
                      Conical test stop 1/2" for connecting test set to the gas pipe 19–32 mm
                        :
                        0554 3151
                      • Accessories
                        Conical test stop
                        Conical test stop 3/4" for connecting the test set to the gas pipe 24-44 mm
                          :
                          0554 3155
                          $ 55.00
                          1
                        • Accessories
                          Single-pipe counter cap
                          Single-pipe gas meter cap, connects test fittings to pipe
                            :
                            0554 3156
                          • Accessories
                            No picture available
                            Two-valve splitter (brass) to connect 2 or more pipes, can be blocked off separately
                              :
                              0554 3161
                            • Accessories
                              No picture available
                              Single-valve stop to block off pipe
                                :
                                0554 3162
                              • Accessories
                                High-pressure stage stop
                                High pressure stage stop 3/8'' and 3/4''
                                  :
                                  0554 3163
                                  $ 77.00
                                  1
                                • Accessories
                                  High-pressure stage stop
                                  High pressure stage stop 1/'' and 1''
                                    :
                                    0554 3164
                                  • Accessories
                                    Lecksuchspray
                                    Leak detection spray for spraying on the gas pipe, shows leaking points where bubbles form
                                      :
                                      0554 3166
                                    • Accessories
                                      Hose set
                                      Hose set for testo 312-4
                                        :
                                        0554 3172
                                      • Accessories
                                        PC Software testo EasyHeat
                                        Set up, download and analyze data - unique data streaming mode
                                          :
                                          0554 3332
                                          $ 181.00
                                          1
                                        • Accessories
                                          Test pump
                                          Test pump to produce test pressure
                                            :
                                            0554 3157
                                            $ 119.00
                                            1