HANNA HI2550 pH/ ORP/ ISE/ EC/ TDS/ NaCl Benchtop Meter

The Hanna Instruments HI 2550 pH/ORP/ISE/EC/TDS/NaCl Benchtop Meter with opto-isolated USB is a 2 channel instrument that measures up to 7 parameters. With this single laboratory bench meter you can measure pH, ORP, ISE, conductivity (EC), TDS, NaCl percentage and temperature. Utilizing an external temperature probe, pH readings are automatically temperature compensated. To ensure a higher level of precision, pH calibrations are up to five calibration points, chosen from the seven available memorized buffers.

The Hanna Instruments HI2550 can measure using ORP electrodes (pH channel input), due to its capability to measure mV with a resolution up to 0.1 mV and also use ISE electrodes on the mV scale (pH channel input). EC measurements can be compensated relative to a selected reference temperature. The EC calibration mode allows you to chose from among six recognized conductivity standards and perform a single-point calibration. The most suitable EC and TDS range for your application is automatically selected. The Hanna Instruments HI 2550 Series of Meters also includes the ability to set and lock the range manually.

This instrument provides GLP capabilities that allows for the storage and retrieval of all data regarding pH, rel mV, EC and NaCl calibration and sample measurement as well as data regarding the maintenance and status of the electrode. With a built-in logging function, measurements are stored in non volatile memory, and can be transferred to a PC through the USB port. Users can manually log up to 200 records and interval log up to 500 records.

Range    pH    -2.0 to 16.0 pH; -2.00 to 16.00 pH; -2.000 to 16.000 pH
ISE & ORP    ±999.9 mV (ISE & ORP); ±2000 mV (ISE & ORP)
EC    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; up to 500.0 mS/cm actual conductivity
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 (with 0.80 factor)
NaCl    0.0 to 400.0% NaCl
Temperature    –20.0 to 120.0 ºC (pH, EC range)
Resolution    pH    0.1 pH; 0.01 pH; 0.001 pH
ISE & ORP    0.1 mV (±999.9 mV); 1 mV (± 2000 mV)
TDS    0.01 ppm; 0.1 ppm; 1 ppm; 0.01 g/L; 0.1 g/L
NaCl    0.1% NaCl
Temperature    0.1 ºC
Accuracy
@ 20°C    pH    ±0.01 pH; ±0.002 pH
ISE & ORP    ±0.2 mV (±999.9 mV); ±1 mV (±2000 mV)
EC    ±1 % reading (±0.05 µS/cm or 1 digit, whichever greater)
TDS    ±1% of reading (±0.03 ppm or 1 digit, whichever greater)
NaCl    ±1% of reading
Temperature    ±0.4 ºC (excluding probe error)
Calibration    pH    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
EC    two point 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
NaCl    one point with HI 7037L standard (optional)
Probes    pH    HI 1131B glass body pH electrode with BNC connector and 1 m (3.3') cable (included)
EC    HI 76310 platinum four ring conductivity/TDS probe with built-in temperature sensor and 1 m (3.3') cable (included)
Temperature    HI 7662 temperature probe with 1 m (3.3') cable (included)
Relative mV Offset         ±2000 mV
Temperature
Compensation         manual or automatic from: -20.0 to 120.0 ºC (pH range) -20.0 to 120.0 ºC (EC range) (can be disabled on conductivity range to measure actual conductivity)
Cond. Temp.
Coefficient         0.00 to 6.00 %/ºC (for EC and TDS only) default value is 1.90 %/ºC
TDS Factor         0.40 to 0.80 (default value is 0.50)
Input Impedance         1012 ohms
PC Connectivity         opto-isolated USB
Log on Demand         200 records
Log Interval Feature         500 records; 5, 10, 30 sec and 1, 2, 5, 10, 15, 30, 60, 120, 180 min stability logging (“StAb”)
Power Supply         12 VDC
Environment         0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions         235 x 218 x 108 mm (9.2 x 8.5 x 4.2”)
Weight         1.3 Kg (2.9 lb); kit with holder 2.1 Kg (4.6 lb.)