Photometric Electrodes Header Image

Hanna Photometric Electrodesfor Use with our Automatic Potentiometric Titrators

These photometric probes are used with a potentiometric titration for equivalence end point detection of colorimetric reactions. These probes are available in 4 different wavelengths from 470 nm to 625 nm and have a universal BNC connector that is used as a potentiometric input on Hanna titrators and autosamplers.

Photometric Electrodes Wave Group

About Photometric Electrodes

pH, ORP and ISE electrodes are commonly used in potentiometric titrations. These probes produce a voltage that changes as a titrant is dosed into the sample being analyzed. The Hanna family of photometric probes use the principle of absorbance at a specific wavelength to identify the equivalence point of a titration with the use of a color indicator. The color change of a solution causes a sharp change in the absorbance which also causes a sharp change in the mV response. It is common for a complexometric titration to end in a flat mV response. Using the Hanna potentiometric titrator it is possible to program the meter to use the first derivative as the end point. This program is ideal since when a color indicator is used the color change occurs very distinctly.

The use of a photometric probe for potentiometric titration can be used for a variety of complexometric titrations including calcium and magnesium water hardness and iron, aluminum and calcium in cement materials testing. The photometric probe is also ideal for non-aqueous titrations such as Total Acid Number (TAN) and Total Base Number (TBN) of petroleum products due to its advantages over a standard pH electrode.

With the photometric probe there is no fill solution to change in order to be compatible with a non-aqueous sample and there is no pH sensor to foul.

Photometric Electrodes Features

Features

Reflective measurement

Reflective measurement

Allows for a high color sensitivity in a compact design. Each probe has an LED at a specific wavelength that shines light through the sample and reflected back by a platinum mirror sealed in glass. The reflective measurement has a fixed path length and allows for a high color sensitivity in a compact design.

Open cell design

Open cell design

The probes’ open cell design that allows for the solution to pass through with the use of a stirrer.

Glass body

Glass body

All of the photometric probes have a glass body that offers excellent chemical resistance. The body of the electrode is 12 mm in diameter and fits easily into sampling beakers.

Universal BNC connector

Universal BNC connector

Hanna Photometric Electrodes feature a universal BNC connector that is used as a potentiometric input on Hanna titrators and autosamplers.

Temperature compensation

Temperature compensation

Drift from variances in temperature are automatically compensated.

LED brightness trimmer

LED brightness trimmer

If needed, a trimmer is provided in the head of the eletrode to adjust the led output value.

HI90060x Series of Photometric Electrodes

All Hanna Photometric Electrodes have the same design but vary in the wavelength of light used for the photometric analysis.

HI900601

HI900601

mV Range
10 to 1100 mV
Wavelength
@ 525 nm
LED color
green LED
HI900602

HI900602

mV Range
10 to 1100 mV
Wavelength
@ 625 nm
LED color
red LED
HI900603

HI900603

mV Range
10 to 1100 mV
Wavelength
@ 590 nm
LED color
orange LED
HI900604

HI900604

mV Range
10 to 1100 mV
Wavelength
@ 470 nm
LED color
blue LED
Copyright © 1996-2020 Hanna Instruments, Inc.