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Home > Education > Bench Meters

pH 21

Easy-Use Basic pH/ORP Benchtop Meter


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  • Easy to use meter for performing specific measurements
  • Automatic pH calibration
  • ORP readings

 

pH 21 is a basic pH and ORP meter designed for simplicity of use in all applications where fast and efficient daily controls are required. This meter is also suitable for the educational field, where students are often first introduced to measuring instruments.

This model measures pH in the 0 to 14 range, with 0.01 resolution. In addition, pH 21 can also measure ORP (mV) by using a proper ORP electrode (optional). The pH calibration procedure is automatic and can be performed at one or two points.

Readings can be manually (MTC) or automatically (ATC) compensated for temperature. The automatic temperature compensation is performed if using the optional HI 7662 temperature probe, while for manual compensation the user can set the temperature value through the arrow keys. The meter is also provided with the HOLD function, which allows to freeze reading on the LCD by simply pressing the HOLD button.

 

Order Information:
pH 21-01 (115V) and pH 21-02 (230V) are supplied with HI 1110B pH electrode, 12 VDC adapter and instructions.

  • Specifications
  • MSDS
  • Accessories
  • Downloads
Range pH 0.00 to 14.00 pH
mV ±1999 mV
Temperature 0.0 to 100.0°C
Resolution pH 0.01 pH
mV 1 mV
Temperature 0.1°C
Accuracy pH ±0.02 pH
mV ±2 mV
Temperature ±1°C
Temperature Compensation   manual (adjustable with arrow keys) or automatic from 0 to 100°C (with temperature probe)
Probe   HI 1110B pH electrode (included);
HI 7662 temperature probe (optional)
pH Calibration   automatic, 1 or 2 point
Power Supply   12 Vdc adapter (included)
Environment   0 to 50°C (32 to 122°F); RH max 95%
Dimensions   230 x 170 x 75 mm (9.1 x 6.7 x 3.0")
Weight   500 g (1.1 lb.)

Click on the links below to download the Safety Data Sheet.

Electrodes
HI 1110B pH Electrode for General Laboratory Use
BNC Connection
HI 3131B Refillable Combination ORP Electrode for Titration and Laboratory Use
BNC Connection
HI 7662 Stainless Steel Temperature Probe
Solutions
HI 7061L General Purpose Cleaning Solution
1 x 500 mL bottle
HI 5004L pH 4.01 buffer solution
HI 5007L pH 7.01 buffer solution
HI 5010L pH 10.01 buffer solution
HI 70300L Electrode Storage Solution
1 x 500 mL bottle
Accessories
HI 76405 Electrode Holder with Steel Base

Manual: (Download)

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Product Accessories

Electrodes
HI 1110B
pH Electrode for General Laboratory Use
BNC Connection
HI 3131B
Refillable Combination ORP Electrode for Titration and Laboratory Use
BNC Connection
HI 7662
Stainless Steel Temperature Probe
Solutions
HI 7061L
General Purpose Cleaning Solution
1 x 500 mL bottle
HI 5004L
pH 4.01 buffer solution

Product Manuals
  Manual: Download





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