Hanna Instruments (M) Sdn Bhd
11A, Jalan PJS 11/20,
Bandar Sunway,
46150 Petaling Jaya,
Selangor, Malaysia.
+603-5638 9940
+603-5638 9829
Penang Branch Office
Hanna Instruments (M) Sdn Bhd
N0. 303-2-27, Krystal Point,
Jalan Sultan Azlan Shah,
11900 Sungai Nibong,
Penang, Malaysia.
+604-638 4558
+604-645 4558

Sabah Branch Office
Hanna Instruments (M) Sdn Bhd

No. 4-1, 1st Floor,
Plaza Kingfisher,
Jalan Plaza Kingfisher 5,
Inanam, 88450 Kota Kinabalu,
Sabah, East Malaysia.
088-382 941
088-382 942

HI2550-02 Multiparameter pH/mV/ISE and EC/TDS/Salinity Benchtop Meter

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HI2550-02 Multiparameter pH/mV/ISE and EC/TDS/Salinity Benchtop Meter Multiparameter Benchtop Meters
RM 3,540.00
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The HI2550 is a rugged and highly accurate multiparameter benchtop meter. Offering two input channels, this meter is able to measure up to seven parameters including pH, ORP, ISE, 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.

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


The HI2550 is a rugged and highly accurate multiparameter benchtop meter that measures pH/ORP/ISE, EC/TDS/Salinity, and temperature with a clear LCD display, data logging capability, and USB port for computer connectivity.

The HI2550 is a dual channel meter that allows for measurement of pH, ORP, and ISE on one channel and EC, TDS, and salinity, on the other. Readings for pH and EC can be manually or automatically compensated for temperature variations with the separate HI7662 temperature probe or from the built-in temperature sensor of the conductivity probe on channel two.

As a pH meter, the HI2550 can be calibrated up to five points with a choice of seven standard buffers or two custom buffers. As an EC/TDS/Salinity meter, the HI2550 can be calibrated at one point for offset and at one point for slope with a choice of six conductivity standards. The % NaCl is calibrated to a single point at 100% with the optional HI7037 salinity standard. 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.

Features at-a-glance

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.

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.

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.

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.

Autoranging - 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.

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.

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.

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).


pH Specifications

pH Range –2.0 to 16.0 pH, -2.000 to 16.000 pH, -2.00 to 16.00 pH
pH Resolution 0.1, 0.01, 0.001 pH
pH Accuracy (@25ºC/77ºF) ±0.01 pH, ±0.002 pH
pH Calibration up to five point calibration, seven standard buffers available (1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45), and two custom buffers
pH Temperature Compensation automatic or manual from -20.0 to 120.0 °C
Relative mV Offset Range ±2000 mV

EC Specifications

EC Range up to 500.0 mS/cm actual* conductivity, 0.00 to 29.99 μS/cm, 30.0 to 299.9 μS/cm, 300 to 2999 μS/cm, 3.00 to 29.99 mS/cm, 30.0 to 200.0 mS/cm
EC Resolution 0.01 μS/cm, 0.1 μS/cm, 1 μS/cm, 0.01 mS/cm, 0.1 mS/cm
EC Accuracy (@25ºC/77ºF) ±1% of reading (±0.05 μS/cm or 1 digit, whichever is greater)
EC Calibration one point slope calibration; six buffers available: 84.0, 1413 μS/cm; 5.00, 12.88, 80.0, 111.8 mS/cm; one point offset: 0.00 μS/cm
EC Temperature Compensation automatic or manual from -20.0 to 120.0°C, or disabled

TDS Specifications

TDS Range up to 400.0 g/L actual* TDS (with 0.80 factor), 0.00 to 14.99 ppm (mg/L), 15.0 to 149.9 ppm (mg/L), 150 to 1499 ppm (mg/L), 1.50 to 14.99 g/L, 15.0 to 100.0 g/L
TDS Resolution 0.01 ppm, 0.1 ppm, 1 ppm, 0.01 g/L, 0.1 g/L
TDS Accuracy (@25ºC/77ºF) ±1% of reading (±0.03 ppm or 1 digit, whichever is greater)
TDS Factor 0.40 to 0.80 (default value is 0.50)

Salinity Specifications

Salinity Range 0.0 to 400.0% NaCl
Salinity Resolution 0.1% NaCl
Salinity Accuracy (@25ºC/77ºF) ±1% of reading (excluding probe error)
Salinity Calibration one point, with HI7037 calibration solution (optional)

Temperature Specifications

Temperature Range -20.0 to 120.0°C (-4.0 to 248.0°F)
Temperature Accuracy ±0.4°C (±0.8°F) (excluding probe error)
Temperature Resolution 0.1°C (0.1°F)
Temperature Coefficient 0.00 to 6.00 %/°C (for EC and TDS only; default value is 1.90 %/°C

ISE Specifications

ISE/ORP Range ±999.9 mV; ±2000 mV
ISE/ORP Resolution 0.1 mV (±1000.0 mV); 1 mV (± 2000 mV)
ISE/ORP Accuracy ± 0.2 mV (±999.9 mV); ± 1 mV (±2000 mV)

Additional Specifications

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.

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