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pH Range: -2.000 to 20.000 pH
pH Resolution: 0.1, 0.01, 0.001 pH
pH Accuracy (@25ºC/77ºF): ±0.1 pH, ±0.01 pH, ±0.002 pH ±1 LSD
pH Calibration: automatic, up to five point calibration, eight standard buffers available (1.68, 3.00, 4.01, 6.86, 7.01, 9.18, 10.01,12.45) and five custom buffers
pH Temperature Compensation: automatic or manual from -20.0 to 120.0 °C
mV Range: ±2000 mV
mV Resolution: 0.1 mV
mV Accuracy: ±0.2 mV ±1 LSD
Relative mV Offset Range: ±2000 mV
EC Range: 0.000 to 9.999 μS/cm, 10.00 to 99.99 μS/cm, 100.0 to 999.9 μS/cm, 1.000 to 9.999 mS/cm, 10.00 to 99.99 mS/cm, 100.0 to 1000.0 mS/cm actual EC*
EC Resolution: 0.001 μS/cm, 0.01 μS/cm, 0.1 μS/cm, 1 μS/cm, 0.001 mS/cm, 0.01 mS/cm, 0.1 mS/cm
EC Accuracy (@25ºC/77ºF): ±1% of reading (±0.01 μS/cm)
EC Calibration: automatic standard recognition (0.000 μS/cm, 84.00 μS/cm, 1.413 mS/cm, 5.000 mS/cm, 12.88 mS/cm, 80.00 mS/cm, 111.8 mS/cm) or user standard; single point or multi-point calibration
TDS Range: 0.000 to 9.999 ppm, 10.00 to 99.99 ppm, 100.0 to 999.9 ppm, 1.000 to 9.999 ppt, 10.00 to 99.99 ppt, 100.0 to 400.0 ppt actual TDS* (with 1.00 factor)
TDS Resolution: 0.001 ppm, 0.01 ppm, 0.1 ppm, 1 ppm, 0.001 ppt, 0.01 ppt, 0.1 ppt
TDS Accuracy (@25ºC/77ºF): ±1% of reading (±0.01 ppm)
Resistivity Range: 1.0 to 99.9 Ω•cm; 100 to 999 Ω•cm; 1.00 to 9.99 KΩ•cm; 10.0 to 99.9 KΩ•cm; 100 to 999 KΩ•cm; 1.00 to 9.99 MΩ•cm; 10.0 to 100.0 MΩ•cm
Resistivity Resolution: 0.1 Ω•cm; 1 Ω•cm; 0.01 KΩ•cm; 0.1 KΩ•cm; 1 KΩ•cm; 0.01 MΩ•cm; 0.1 MΩ•cm*
Resistivity Accuracy: ±2% of reading (±1 Ω•cm)
Salinity Range: practical scale: 0.00 to 42.00 psu; natural seawater scale: 0.00 to 80.00 ppt; percent scale: 0.0 to 400.0%
Salinity Resolution: 0.01 for practical scale/natural seawater scale; 0.1% for percent scale
Salinity Accuracy (@25ºC/77ºF): ±1% of reading
Salinity Calibration: percent scale—one-point (with HI7037 standard)
Temperature Range: -20.0 to 120.0 ºC**; -4.0 to 248.0 ºF**; 253.15 to 393.15 K**
Temperature Resolution: 0.1 °C, 0.1 °F, 0.1 K
Temperature Accuracy: ±0.2 °C; ±0.4 °F; ±0.2 K (without probe)
Temperature Compensation: disabled, linear and non-linear (natural water)
Temperature Coefficient: 0.00 to 10.00 %/°C
Reference Temperature: 5.0 to 30.0 °C
Cell Constant: 0.0500 to 200.00
Cell Type: 4 cells
Electrode/Probe: HI1131B glass body pH electrode with BNC connector and 1 m cable (included); HI76312 platinum, four-ring EC/TDS probe with and 1 m cable (included)
Temperature Probe: HI7662-T stainless steel temperature probe with 1 m cable (included)
Profiles: up to 10, 5 each channel
USP ⟨645⟩ Compliant: yes
GLP: calibration data including date, time, buffers used, offset and slope for pH. Cell constant, reference temperature, temperature coefficient, calibration points, calibration time stamp, probe offset for conductivity
Logging: record: 100,000 data point storage, up to 100 lots with max. 50,000 records/lot; interval: settable between 1 second and max log time of 180 minutes; type: automatic, manual, AutoHOLD; additional: 200 records USP
Input Channels: 1 pH/ORP + 1 EC/TDS/Salinity/Resistivity
Display: color graphic LCD with on-screen help, graphing, and custom color configuration
Connectivity: USB
Environment: 0 to 50°C (32 to 122°F; 273 to 323 K), RH max 95% non-condensing
Power Supply: 12 VDC adapter (included)
Dimensions: 160 x 231 x 94 mm (6.3 x 9.1 x 3.7”)
Weight 1.2 kg (2.64 lbs.)
Ordering Information: HI5521-02 is supplied with HI1131 pH electrode, HI7662-T temperature probe, HI76312 conductivity probe, HI76404W electrode holder, HI70004 pH 4.01 buffer solution sachet, HI70007 pH 7.01 buffer solution sachet, HI700601 electrode cleaning solution sachet (2), HI7082 3.5M KCl electrolyte solution (30 mL), 12 VDC power adapter and instructions.
