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Environment Testers


  • testo 477 - LED stroboscope


    • Very high measurement range (up to 300,000 flashes per minute).
    • Very high illumination (up to 1500 Lux).
    • Long operating times (battery power for up to 5 h).
    • Trigger input and output (for connectivity to external systems and control via external sensor).

  • testo 510 - Digital manometer


    • Temperature and air density compensation for accurate airflow measurements.
    • Measures differential pressure to 40 in. H2O.
    • Backlit display ensures easy readability in low light situations.
    • Temperature compensated pressure sensor.

  • testo 510i - Differential pressure manometer wireless Smart Probe


    • Measures static pressure, air flow, and volume flow (pitot tube not included).
    • Measures manifold pressure and pressure drop across filters and coils, and has a measurement menu in the Smart Probes app that includes pressure drop alarms.
    • Easy configuration and calculations for volume flow (enter pitot tube factor and dimensions easily).
    • Magnetic back holds instrument for hands-free operation.

  • testo 511 - Pocket-sized absolute pressure measuring instrument


    • High-precision absolute pressure measurement with an accuracy of ±3 hPa.
    • Suitable for barometric altitude measurements.
    • Calculates the barometric air pressure.
    • 8 pressure units available.

  • testo 512 - Pressure and flow velocity measuring instrument 0 to 2000 hPa


    • 7 pressure units to choose from: psi, kPa, hPa, mmH2O, mmHg, inH2O, inHg.
    • Large measuring range up to 2000 hPa.
    • TopSafe protective case (optional) protects against impact, dirt, and spray water.
    • Backlit display / min and max values / hold function.

  • testo 521-1 - Differential pressure measuring instrument 0 to 100 hPa (accuracy ±0.2% of f.v.)


    • Integrated differential pressure sensor with an accuracy of 0.2 % of f.v.
    • Calculation of the flow velocity and the volume flow via Pitot tube (optional).
    • Multi-point and timed mean calculation.
    • 2 probe inputs for additional pressure and temperature probes.

  • testo 526-1 - Differential pressure measuring instrument 0 to 2000 hPa (accuracy ±0.1% of f.v.)


    • Temperature-compensated differential pressure sensor.
    • Multi-point and timed mean calculation.
    • Recording of measurement data with freely selectable measuring rate.
    • 2 probe inputs for pressure and temperature.

  • testo 540 - Light meter


    • For quick and easy measurements in the workplace.
    • Sensor based on the spectral sensitivity of the human eye.
    • Hold function, min/max values.
    • Protective cap for safe storage.