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HI-2550 pH/ORP/ISE, EC/TDS/NaCl Benchtop Meter

HI-2550 pH/ORP/ISE, EC/TDS/NaCl Benchtop Meter

Hanna HI-2550 pH/ORP/ISE, EC/TDS/NaCl Benchtop Meter

HI-2550 pH/ORP/ISE, EC/TDS/NaCl Benchtop Meter

Complete with EC probe
2 year manufacturer warranty
In Stock
£668.60 (exc. VAT) £802.32 (inc. VAT)

The HI-2550 is a two-channel logging micro-processor based meter for measuring pH, ORP, conductivity, total dissolved solids, % sodium chloride and temperature.

HI-2550 pH/ORP/ISE, EC/TDS/NaCl Benchtop Meter information

Hanna's extended description

With the added benefit of a relative mV feature, this high specification bench meter is perfect for use in professional laboratories.

pH readings are automatically temperature compensated using an external temperature probe. To ensure maximum precision, the meter offers up to five point calibration with seven memorised buffers.

Measurement of mV with a resolution of up to 0.1mV can be taken using ORP electrodes through the pH channel input. It also uses ISE electrodes on the mV scale.

Conductivity measurements can be compensated relative to a selected reference temperature. The EC calibration mode allows the user to choose from among six recognised conductivity standards and perform single-point calibration. The most suitable EC and TDS range is automatically selected. The HI-2550-02 also offers the ability to set and lock the range manually.

GLP capabilities facilitate storage and retrieval of all data for pH, relative mV, EC and NaCl calibration and sample measurement. Data on maintenance and status of the electrode is also recorded.

The built-in logging function allows measurements to be stored and transferred to a PC through a USB interface. Users can manually log up to 200 records and interval log up to 500 records.

Key features

  • Practical wide-based bench meter with two input channels
  • Measures up to seven parameters
  • Simultaneous measurement of pH, EC and temperature using separate sensors (supplied)
  • Offering extra wide temperature range
  • One electrode holder included as standard
  • pH and EC electrodes and temperature probe all supplied as standard
  • Wide screen LCD and rubberised keyboard with intuitive buttons
  • Up to five point calibration with seven standard and two custom buffers
  • EC/ TDS auto ranging, manual ranging and range lock
  • HOLD button freezes readings on display
  • Automatic temperature compensation for pH & EC
  • Log on demand of up to 200 readings with USB connection for data download Interval logging of up to 500 samples

Replaceable Electrode – No need to replace the whole meter when the electrode needs replacing. Spare and replacement electrodes are available for this product.

PC Interface - Download test results to a computer programmed with HANNA’s Windows® compatible software (HI-92000), directly from equipment via a USB port or a RS232 cable outlet.


Specifications list


Range - pH/ORP -2.00 to 16.00 pH; -2.000 to 16.000 pH / ±699.9 mV; ±2000 mV
Range - EC 0.00 to 29.99 µS/cm; 30.0 to 299.9 µS/cm; 300 to 2999 mS/cm
3.00 to 29.99 mS/cm; 30.0 to 200.0 mS/cm; up to 500.0 mS/cm actual EC*
Range - TDS 0.00 to 14.99 ppm; 15.0 to 149.9 ppm; 150 to 1499 ppm;
1.50 to 14.99 g/L; 15.0 to 100.0 g/L; up to 400.0 g/L actual TDS*
Range - NaCl 0.0 to 400.0% NaCl
Range - Temperature -10 to 120.0°C (pH); 0.0 to 60.0°C (EC)
Resolution - pH/ORP 0.01 pH; 0.001 pH / 0.1 mV (±699.9 mV); 1 mV (±2000 mV)
Resolution - EC 0.01 µS/cm; 0.1 µS/cm; 1 µS/cm; 0.01 mS/cm; 0.1 mS/cm
Resolution - TDS 0.01 ppm; 0.1 ppm; 1 ppm; 0.01 g/L; 0.1 g/L
Resolution - NaCl 0.1% NaCl
Resolution - Temperature 0.1°C
Accuracy - pH/ORP ±0.01 pH; ±0.002 pH / ±0.2 mV (±699.9 mV); ±1 mV (±2000 mV)
Accuracy - EC ±1% of reading ±(0.05 µS/cm or 1 digit)
Accuracy - TDS ±1% of reading ±(0.03 ppm or 1 digit)
Accuracy - NaCl ±1% of reading
Accuracy - Temperature ±0.4°C (excluding probe error)
Relative mV Offset Range ±2000 mV
Calibration - pH automatic, at 1, 2 or 3 points, with 5 memorised buffers (4.01, 6.86, 7.01, 9.18, 10.01)
Calibration - EC automatic, 1 point, with 6 memorised values (84.0 and 1413 µS/cm; 5.00, 12.88, 80.0 and 111.8 mS/cm)
Calibration - NaCl automatic, 1 point, with HI-7037L calibration solutions
Temperature Compensation manual or automatic, -10.0 to 120.0°C (14 to 248°F) for pH; 0.0 to 60.0°C (32 to 140°F) for EC; (can be disabled for measuring actual EC and TDS values)
Temperature Coefficient 0.00 to 6.00%/°C (EC and TDS only); default value: 1.90%/°C
TDS Conversion Factor 0.40 to 0.80; default value: 0.50
pH Electrode HI-1131B (included)
EC Probe HI-76310 (included)
Temperature Probe HI-7662 (included)
PC Connection RS232 opto-isolated serial port
Data Logging 200 samples
Input Impedance 1012 Ohm
Power Supply 12 Vdc adapter (included)
Environment 0 to 50°C (32 to 122°F); RH max 95%
Dimensions 240 x 182 x 74 mm (9.4 x 7.2 x 2.9")
Weight 1.1 kg (2.4 lb.)

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