The HI5521 is an advanced research grade benchtop pH/ORP and EC/TDS/Salinity/Resistivity meter that is completely customizable with a large color LCD, capacitive touch keys, and USB port for computer connectivity.

Features:

• Highly Customizable User Interface 
• Color Graphic LCD 
• Capacitive Touch
• Four Ring Conductivity Probe 
• Automatic buffer recognition, semiautomatic, and direct manual entry pH calibration options are available for calibrating up to five points, from a selection of eight standard buffers and up to five custom buffers.  
• CAL Check™ – CAL Check™ alerts users to potential problems during the calibration of the pH electrode. 
• GLP Data – HI5521 includes a GLP Feature thatallows users to view calibration data and calibration expiration information at the touch of a key. Calibration data include date, time, standards used for calibration.
• Automatic and manual logs up to 100 lots with 50,000 records max/lot, with up to 100,000 total data points. 
• Data can be transferred to a PC with USB cable and HI92000 software (both sold separately).
• Contextual Help – Contextual help is always available through a dedicated “HELP” key. 

Specifications: 

• pH Range: -2.000 to 20.000 pH
• pH Accuracy (@25ºC/77ºF): ±0.1 pH, ±0.01 pH, ±0.002 pH ±1 LSD
• 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 Accuracy (@25ºC/77ºF): ±1% of reading (±0.01 μS/cm)
• 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)
• 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
• 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%
• Temperature Range: -20.0 to 120.0 ºC**; -4.0 to 248.0 ºF**; 253.15 to 393.15 K** 

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