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The HI84531 is an easy to use, fast and affordable mini automatic titrator and pH meter designed for low to high levels of alkalinity.
It performs a potentiometric titration with a pH electrode to determine total titratable alkalinity or strong alkalinity in water. A titrant is slowly added to the sample while the pH and temperature are carefully monitored. The software analyzes the resulting titration curve and calculates the volume of titrant required to reach the endpoint. The user can choose either to measure strong alkalinity with a 8.30 pH endpoint (known as phenolphthalein alkalinity) or total alkalinity with a 4.50 pH endpoint (known as bromcresol green-methyl red alkalinity). The dispensed titrant volume is used to automatically calculate the alkalinity, which can be displayed in mg/L or meq/L as CaCO₃.
This mini titrator is also designed to be used as a benchtop pH/mV meter. As a pH meter, it has many features of a professional grade benchtop including automatic calibration up to three points with four available buffers, a 0.01 pH resolution, accuracy of ±0.01 pH, automatic temperature compensation, and comprehensive GLP data.
Hanna’s CAL Check feature analyzes the response of the electrode during the calibration process and alerts the user of potential problems during calibration. The CAL Check function not only ensures an accurate pH reading when used as a pH meter, but also for an accurate titration since the endpoint is determined by a set pH value.
- Piston driven pump with dynamic dosing
- For highly accurate, repeatable results
- CAL Check™
- Alerts users to potential problems during calibration such as contaminated buffers or dirty/broken pH electrodes
- Log-on-demand
- Log data up to 400 samples (200 for titration; 200 for pH/mV)
- Graphic mode/exportable data
- Displays in-depth data on titration, which can then be stored and exported to either a USB drive or PC using the USB connection
- Automatic stirrer speed control
- Maintains stirrer speed at approximately 600 rpm regardless of viscosity of solution
- GLP features
- Date, time, offset, slope and buffers used
- Easy-to-use interface
- User intuitive design with large keys and easy to navigate screens
- HELP features
- Dedicated HELP key for content sensitive help
- pH/mV meter
- Doubles as a benchtop pH meter
On-screen Features
Easy and clear measurement
- The HI84531 is designed to measure low to high levels of alkalinity in a few easy steps.
Titration curve displayed on screen
- The HI84531 offers real time graphing of the titration curve on the LCD.
pH meter with electrode condition on display
- The HI84531 also functions as a pH meter. The HI84531 also displays the electrode condition on the LCD using Hanna’s exclusive electrode diagnostics.
CAL Check™
- Alerts users to potential problems during calibration such as contaminated buffers or a dirty/broken pH electrode.
Log and recall data
- The HI84531 can log up to 400 samples (200 for titration; 200 for pH/mV) and recall or export data to a USB drive or PC.
GLP
- The GLP feature records electrode and pump calibration data to help keep measurements accurate and reliable.
| pH Range | -2.0 to 16.0 pH; -2.00 to 16.00 pH |
|---|---|
| pH Resolution | 0.1 pH / 0.01 pH |
| pH Accuracy | ±0.01 pH (@25ºC/77ºF) |
| pH Calibration | one, two or three-point calibration; four available buffers (4.01, 7.01, 8.30, 10.01) |
| pH Temperature Compensation | manual or automatic |
| pH-mV Range | -2000.0 to 2000.0 mV |
|---|---|
| pH-mV Resolution | 0.1 mV |
| pH-mV Accuracy | ±1.0 mV (@25ºC/77ºF) |
| Temperature Range | -20.0 to 120.0°C; -4.0 to 248.0°F; 253.2 to 393.2 K |
|---|---|
| Temperature Resolution | 0.1°C; 0.1°F; 0.1K |
| Temperature Accuracy | ±0.4°C; ±0.8°F; ±0.4 K (@25ºC/77ºF) |
| Titration Range (as CaCO₃) | Low Range: 30.0 to 400.0 mg/L; 0.6 to 8.0 meq/L High Range: 300 to 4000 mg/L; 6.0 to 80.0 meq/L |
|---|---|
| Titration Resolution | Low Range: 0.1 mg/L (ppm); 0.1 meq/L; High Range: 1 mg/L (ppm); 1 meq/L |
| Titration Accuracy | Low Range: ±1 mg/L or 3% of reading, whichever is greater High Range: ±10 mg/L or 3% of reading, whichever is greater |
| Titration Method | acid-base titration (strong alkalinity/total alkalinity) |
| Titration Principle | endpoint titration: 8.30 pH (phenolphthalein) / 4.50 pH (bromcresol green-methyl red) |
| Pump volume | 10 mL/min |
| Stirring speed | 600 rpm |
| pH Electrode | HI1131B glass body pH electrode with BNC connector and 1 m (3.3’) cable (included) |
|---|---|
| Temperature Probe | HI7662-T stainless steel temperature probe with 1 m (3.3’) cable (included) |
| Logging Type | Log-on-demand |
| Logging Memory | up to 400 ( 200 titrations, 200 pH/mV readings) |
| Connectivity | 1 USB port for data storage and export to a PC |
| Power Supply | 12 VDC adapter (included) |
| Environment | 0 to 50°C (32 to 122°F); RH max 95% non-condensing |
| Dimensions | 235 x 200 x 150 mm (9.2 x 7.9 x 5.9”) |
| Weight | 1.9 kg (67.0 oz.) |
| Ordering Information | HI84531-01 (115V) and HI84531-02 (230V) are supplied with HI1131B pH electrode, HI7662-T temperature probe,HI7082 electrode fill solution, HI84531-70 reagent kit for water analysis, 100 mL beakers (2), dosing pump valve, 5 mL syringe, 2000 μL automatic pipette (1) with plastic tips (2), 20 mL beakers (2), tube set (aspiration tube with titrant bottle cap and dispensing tube with tip), stir bar, power adapter, instruction manual and quality certificate. |
