Multiparameter pH/ORP and EC/TDS/Salinity Benchtop Meter


The HI2550 is a rugged and highly accurate multiparameter benchtop meter. Offering two input channels, this meter is able to measure up to 6 parameters including pH, ORP, EC, TDS, salinity, and temperature. The meter comes with Hanna’s HI1131B glass pH electrode, HI76310 four-ring conductivity probe, and a temperature probe to allow for automatic temperature compensation. The HI2550 offers many features including five-point pH calibration, auto ranging EC and TDS measurements, data logging, comprehensive GLP data, and PC connectivity via USB to provide users with a simple way to organize and manage their data.

•  Autoranging EC and TDS measurements
•  Automatic Temperature Compensation
•  Two Independent Channels

Features at-a-glance
Adjustable TDS Factor
•  The factor that relates conductivity to total dissolved solids is based on the type of sample being measured.
•  For users to get an accurate determination of TDS based on their unique solution, the TDS factor is adjustable from 0.40 to 0.80.

  Automatic Calibration
•  The pH channel offers up to five-point pH calibration with seven standard buffers and up to two custom buffers.
•  EC and TDS are automatically calibrated at one point with a choice of six pre-programmed standards.
•  Salinity is calibrated at one point using the HI7037 100% NaCl standard solution.

•  The In the EC and TDS measurement modes, the HI2550 automatically chooses the optimum measurement scale based on the sample solution to maintain the highest possible accuracy.

  Data Logging
•  The log-on-demand feature allows up to 200 data points to be recorded.
•  Up to 500 data points can be recorded when utilizing interval logging, which allows the user to specify time intervals from 5 seconds to 180 minutes.

  Data Transfer
•  With a built-in logging function, measurements are stored in non-volatile memory, and can be transferred to a PC through the USB port using the optional HI92000 software and HI920013 USB cable (both sold separately).

  HI76310 Conductivity Probe
•  The HI76310 platinum, four-ring probe measures EC, TDS, and salinity.
•  The probe features a built-in temperature sensor and operates over a wide range from 0.00 μS/cm to 500.0 mS/cm (actual conductivity), 0.00 to 400.0 g/L (actual TDS), and 0.0 to 400.0% NaCl.

  HI1131B pH Electrode
•  The HI2550 is supplied with the HI1131B glass body, double junction, refillable pH electrode with an indicating sensor made of High Temperature (HT) glass.
•  The double junction and HT glass design allows the HI1131B to be used in a wide variety of application from samples with metals and Tris buffer to samples at elevated temperatures.

  GLP Data
•  The calibration data including date, time, standards used, offset, slope, cell constant, and cell factor can be accessed at any time by pressing the dedicated GLP button.

  Temperature Compensation
•  Temperature measurements for pH and EC can be compensated for automatically (ATC) or manually (MTC) from -20.0 to 120.0°C, or compensation can be disabled for actual conductivity or TDS measurements.
•  The temperature correction coefficient for EC or TDS, also referred to as β, is adjustable from 0.00 to 6.00 %/°C.


 pH Electrode : HI1131B glass body pH electrode with BNC connector and 1 m (3.3’) cable (included)
 EC Probe                   : HI76310 platinum four-ring EC/TDS probe and 1 m (3.3’) cable (included)
 Temperature Probe   : HI7662 temperature probe, stainless steel with 1 m (3.3’) cable (included)
 Logging : 200 samples, log-on-demand
 Logging Interval : 500 records; 5, 10, 30 sec and 1, 2, 5, 10, 15, 30, 60, 120, 180 min stability logging
 Connectivity : opto-isolated USB
 Environment : 0 to 50°C (32 to 122°F), RH max 95% non-condensing
 Input Impedance : 10¹² Ohms
 Power Supply : 12 VDC adapter (included)
 Dimensions : 235 x 222 x 109 mm (9.2 x 8.7 x 4.3”)
 Weight : 1.3 kg (2.9 lb); kit with holder 2.1 kg (4.6 lb)
 Ordering Information : HI2550 is supplied with HI1131B pH electrode, HI76310 EC/TDS probe, HI7662 temperature probe, HI76404N electrode holder, HI70004 pH 4.01 buffer solution sachet,

HI70007 pH 7.01 buffer solution sachet, HI7071 Electrolyte Fill Solution, 3.5M KCl + AgCl (30 mL), 12 VDC adapter and instruction manual.

 Warranty : 2 years (probe 6 months)

Order now

To make your order, please contact us at  info@polyscientific.com.my or call us at +6 06 3350 690

Go to Top