The Hanna HI 2550 is a high performance precision instrument that measures a multitude of parameters, each over a wide range. With this single laboratory bench meter you can measure pH, ORP, conductivity, TDS, NaCl percentage and temperature. It comes with the pH electrode, temperature probe and conductivity probe. ISE electrodes, ORP probes and other probes are available at extra cost.
Utilizing an external temperature probe, pH readings are automatically temperature compensated. pH calibrations are customizable - up to 3 reference points, chosen from the 5 available memorized buffers - to ensure a higher level of precision. EC measurements can be compensated relative to a selected reference temperature of 20 or 25°C. The EC calibration mode allows you to chose from among 6 memorized buffers and performed at single-point calibration. The most suitable EC and TDS range for your application is automatically selected.
With a built-in logging function, measurements are stored in non volatile memory, and can be downloaded to a PC through the RS232 serial port. In addition to these features, HI 2550 is contains GLP features that store the calibration and measurement data of any sample, to be displayed upon request.
Extra wide LCD
Extended Temperature Range
Up to 5 point pH calibration
Log-on Stability Feature
pH/ORP -2.00 to 16.00 pH; -2.000 to 16.000 pH / ±699.9 mV; ±2000 mV
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*
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*
NaCl 0.0 to 400.0% NaCl
Temperature -10 to 120.0°C (pH); 0.0 to 60.0°C (EC)
pH/ORP 0.01 pH; 0.001 pH / 0.1 mV (±699.9 mV); 1 mV (±2000 mV)
EC 0.01 µS/cm; 0.1 µS/cm; 1 µS/cm; 0.01 mS/cm; 0.1 mS/cm
TDS 0.01 ppm; 0.1 ppm; 1 ppm; 0.01 g/L; 0.1 g/L
NaCl 0.1% NaCl
pH automatic, at 1, 2 or 3 points, with 5 memorized buffers (4.01, 6.86, 7.01, 9.18, 10.01)
EC automatic, 1 point, with 6 memorized values (84.0 and 1413 µS/cm; 5.00, 12.88, 80.0 and 111.8 mS/cm)
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)
HI 2550 is supplied with a pH electrode, conductivity probe, temperature probe, electrode holder, pH 4 and pH 7 buffer solutions, electrolyte solution, 12 Vdc power adapter and instructions.
The following link provides additional information from the instruction manual or original manufacturer's brochure. Right-click to open the PDF in a new window or download it: Hanna HI 2550 Digital Bench-model pH-Conductivity-TDS Meter