Senseca Germany GmbH

PRO 52x - Waterprof conductivity meter, graphical display

Producer

  • NEW IN 02.2026

    • The PRO 521 and PRO 525 are top-of-the-range professional conductivity meters offering a wide range of features, high-grade robustness and user-friendly operation for safe and reliable use in water analysis applications.
      The PRO 525 has data logging capabilities. Its water, drop and impact protection make it a perfect choice for field use, and its integrated pop-up stand makes it ideal for laboratory use.
      The practice proven measuring cells of the several variants are the top choices for any application:
      -425 wide range for environmental and laboratory
      -200 high resolution pure water e.g. for filtering and deionization
      -210 glass platinum for colors, petrol, alcohol and similar.

    Storage capacity:
    we
    Logging type:
    PRO 525 only: Automatic with manual start/stop
    Temperature Input:
    via connected measuring cell
    Measurement rate:
    1 meas/s
    Clock:
    User-adjustable date and RTC function (max. drift 1 min/month @ 25 °C)
    User interface:
    Multilingual (de, en, it, fr, es)
    PC connection:
    USB C
    Power supply:
    4 x Alkaline AA cells (incl. in scope of delivery)
    External 5 V DC via USB C (power adapter or PC USB port)
    Power consumption:
    18 mA typ.
    Battery runtime:
    > 150 h typ. continuous operation (backlight off).
    Auto power off:
    User configurable
    Automatically disabled if external power is connected
    Housing material:
    Shock and impact proof, ABS, TPE (side protection), Polyester (front panel),
    Operating conditions:
    -5 ... +50 °C; 0 ... 95 % RH (non-condensing)
    Storage temperature:
    -25 … 65 °C (without batteries)
    Display:
    140 x 160 dot-matrix LCD with backlight / visible area 42 x 50 mm, display of large-digit single values, statistical info (min/avg/max), chart view
    Dimensions:
    170 x 78 x 38 mm
    Standard functions:
    Acoustic/optic alarm, automatic power-off, Favorites menu
    Data logger with read out via USB:
    yes
    Extras:
    Foldable stand and magnet for flexible operation
    Channels:
    BNC input for pH/ORP with connectors for integrated NTC or Pt1000 sensors
    Protection degree:
    IP 67
    IK 04
     
     
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Article no. Order Code Version Resolution Measuring range Probe (permanently connected) Probe diameter Accuracy Scope of delivery minimal quantity Product comparison
489193 PRO 521-425 PRO 521-425 Without data logger min. 0.1 µS/cm 0.0 … 500.0 µS/cm - 0 … 1000 mS/cm 4 pole graphite/epoxy/PVCU, Pt1000 Ø 16 mm ±0.5 % of value ±0.2% FS or ±2 µS/cm Instrument in carton box, incl batteries, Quickstart, test protocol 1 Delivery time
489194 PRO 525-425 PRO 521-425 data logger min. 0.1 µS/cm 0.0 … 500.0 µS/cm - 0 … 1000 mS/cm 4 pole graphite/epoxy/PVCU, Pt1000 Ø 16 mm ±0.5 % of value ±0.2% FS or ±2 µS/cm Instrument in carton box, incl batteries, Quickstart, test protocol 1 Delivery time
489668 PRO 521-200 PRO 521-200 Without data logger min. 0.001 µS/cm 0.000 … 2.000 μS/cm - 0.0 … 100.0 μS/cm 2 pole stainless steel/Peek Ø 12 mm Typ. ±1 % of value ±0.5 % FS Instrument in carton box, incl batteries, Quickstart, test protocol 1 Delivery time
489670 PRO 525-200 PRO 525-200 data logger min. 0.001 µS/cm 0.000 … 2.000 μS/cm - 0.0 … 100.0 μS/cm 2 pole stainless steel/Peek Ø 12 mm Typ. ±1 % of value ±0.5 % FS Instrument in carton box, incl batteries, Quickstart, test protocol 1 Delivery time

The software and firmware for our devices is available here