HI 4521 Research Grade Meter with Calibration Check™ and USP pH/ ORP and EC/ TDS/ Resistivity/ Salinity and Temperature

Up to eight measurement parameters
Two input channels pH/ ORP and EC/ TDS/ Resistivity/ Salinity
pH Calibration Check™
Five point pH calibration with standard and custom buffers
USP 645 method and salinity scales
Fully customizable
Large log memory with different logging methods

HI 4521 is a research grade, benchtop instrument that features 7 measurement parameters: pH, ORP ( Oxidation Reduction Potential) , conductivity, resistivity, TDS, salinity and temperature. This meter incorporates dual channels with a separate temperature input and support the external reference electrodes required by half cell pH sensors.

The user interface is customizable and capable of displaying two channels at the same time, showing the measurements in various modes: basic measurement with or without GLP information, graph or logging data.

This instrument offers multi-language support and contextual help is available through a dedicated Help key. Clear tutorial messages and directions are available on-screen to quickly and easily guide users through all measurement and calibration procedures to ensure measurements and calibrations are performed properly.

HANNA’ s pH Calibration Check™ diagnostics system ensures accurate readings every time by alerting users of potential problems during the calibration process. The Calibration Check™ system eliminates erroneous readings due to dirty or faulty pH electrodes or contaminated pH? buffer solutions. After the guided calibration process, electrode condition is evaluated and an indicator is displayed informing the user of the overall pH electrode status.

Automatic, semiautomatic and manual pH calibration is available in up to five points, with eight standard ( 1.68, 3.00, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45) and up to five custom buffers. The Out of Calibration Range and Cal Due features alert the user in the event the measurement is far from the calibration point or when the meter is due for recalibration. Proper, scheduled calibrations are crucial for accurate and repeatable measurements.

Up to a four point automatic or custom standard conductivity calibration can be performed in up to four points as well as probe cell constant. One fixed point salinity calibration can be performed on the Percent Scale only. Three salinity ranges are available: practical scale, natural sea water scale and percentage scale.

Up to ten profiles can be saved and recalled eliminating the need to reconfigure each time when a different probe is used. User definable configurations can include: temperature compensation in accordance with each parameter, isopotential points for pH, temperature units, EC temperature reference, EC temperature coefficient, EC probe type, and cell constant.

Three selectable logging modes are available: Automatic, Manual and AutoHold logging. Up to 100 logging lots with up to 10, 000 recods each can be stored for automatic or manual modes along with up to 200 USP reports. Automatic logging features a selectable area and sampling period while GLP information includes complete data about user calibration of each parameter and identification information for the instrument, user, and company. Data can be transferred to a PC via the opto-isolated RS232 or USB ports and HI 92000 software ( optional) .

Order Information:
HI 4521-01 ( 115V) , HI 4521-02 ( 230V) , are supplied with HI 76312 conductivity/ TDS probe, HI 1131B pH electrode, HI 7662-T temperature probe, HI 70004 pH 4.01 buffer solution sachet, HI 70007 pH 7.01 buffer solution sachet, HI 700661 electrode cleaning solution sachet ( 2) , HI 7071S electrolyte solution ( 30 mL) , HI 76404N electrode holder 12 VDC adapter and instructions.

pH Range -2.000 to 20.000 pH
Resolution 0.1 pH; 0.01 pH; 0.001 pH
Accuracy @ 20° C ± 0.1 pH; ± 0.01 pH; ± 0.002 pH ± 1 LSD
ORP Range ± 2000 mV
Resolution 0.1 mV
Accuracy @ 20° C ± 0.2 mV ± 1 LSD
Conductivity Range 0.000 to 9.999 µ S/ cm; 10.00 to 99.99 µ S/ cm; 100.0 to 999.9 µ S/ cm; 1.000 to 9.999 mS/ cm; 10.00 to 99.99 mS/ cm; 100.0 to 999.9 mS/ cm; 1000 mS/ cm
Resolution 0.001 µ S/ cm; 0.01 µ S/ cm; 0.1 µ S/ cm; 0.001 mS/ cm; 0.01 mS/ cm; 0.1 mS/ cm
Accuracy @ 20° C ± 1% of reading ( ± 0.01 µ S/ cm)
Cell Constant 0.0500 to 200.00
Cell Type 2, 4 rings
Calibration Type auto standard recognition, user standard single point / multi point calibration
Calibration
Reminder yes
Temperature
Coefficient 0.00 to 10.00 % / º C
Reference
Temperature 15.0 ° C to 30.0º C
Profiles up to 10
USP Compliant yes
Resistivity Range 1.0 to 99.9 Ohms x cm; 100 to 999 Ohms x cm; 1.00 to 9.99 kOhms x cm; 10.0 to 99.9 kOhms x cm; 100 to 999 kOhms x cm; 1.00 to 9.99 MOhms x cm; 10.0 to 100.0 MOhms x cm
Resolution 0.1 Ohms x cm; 1 Ohms x cm; 0.01 kOhms x cm; 0.1 kOhms x cm; 1 kOhms x cm; 0.01 MOhms x cm; 0.1 MOhms x cm
Accuracy @ 20° C ± 2% of reading ( ± 1 Ohm x 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)
Resolution 0.001 ppm; 0.01 ppm; 0.1 ppm; 0.001 ppt; 0.01 ppt; 0.1 ppt
Accuracy @ 20° C ± 1% of reading ( ± 0.01 ppm)
Salinity Range practical scale: 0.00 to 42.00 psu; natural sea water scale: 0.00 to 80.00 ppt; percent scale: 0.0 to 400.0%
Resolution 0.01 for practical scale/ natural sea water scale; 0.1% for percent scale
Accuracy @ 20° C ± 1% of reading
Temperature Range -20.0 to 120° C; -4.0 to 248.0° F; 253.15 to 393.15K
Resolution 0.1° C; 0.1° F; 0.1K
Accuracy @ 20° C ± 0.2° C; ± 0.4° F; ± 0.2K ( without probe)
Calibration pH 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
Conductivity auto standard recognition, user standard single point/ multi-point
Salinity percent scale— 1 point ( with HI 7037 standard)
pH Calibration Check™ yes
Relative mV
Offset Range ± 2000 mV
Input Channels 1 pH/ ORP + 1 EC
GLP cell constant, reference temperature/ coefficient, calibration points, cal time stamp, probe offset for conductivity
Temperature
Compensation pH automatic or manual from -20.0 to 120.0° C/ -4.0 to 248.0° / 253 to 393K
EC disabled, linear and non-linear ( natural water)
pH Electrode HI 1131B glass body pH electrode with BNC connector and 1 m ( 3.3’ ) cable ( included)
EC Probe HI 76312 platinum, 4-ring conductivity/ TDS probe with internal temperature sensor and 1 m ( 3.3’ ) cable ( included)
Temperature Probe HI 7662-T stainless steel temperature probe with 1 m ( 3.3’ ) cable ( included)
Logging Record 100 lots with 10, 000 record/ lot
Interval settable between 1 and max log time
Type automatic, log on demand, auto HOLD
Replatinization yes
Display color graphic LCD with on-screen help, graphing, language selection and custom configuration
PC Connection USB and RS232
Power Supply 12 VDC adapter ( included)
Environment 0-50º C ( 32 to 122º F) ( 273 to 323K) RH max 95% non-condensing
Dimensions/ Weight 160 x 231 x 94 mm ( 6.3 x 9.1 x 3.7” ) / 1.2 Kg ( 2.64 lbs.)