Hanna Instruments

Scientific Equipment

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HI-96741 Total Hardness and Iron Portable Photometer

HI-96741 Total Hardness and Iron Portable Photometer

HI-96741 Total Hardness and Iron Portable Photometer

HI-96741 Total Hardness and Iron Portable Photometer

Complete with cuvettes
2 year manufacturer warranty
£293.70 (exc. VAT) £352.44 (inc. VAT)
Total Hardness and Iron Meter - supplied with 2 cuvettes and caps.

HI-96741 Total Hardness and Iron Portable Photometer information

Hanna's extended description

Total Hardness and Iron Portable Photometer

The HI-96741 can provide critical measurements of low range iron and total hardness (magnesium and calcium). The iron concentration in water needs to be monitored since it can become harmful above certain levels.

Hardness, on the other hand, is indicative of the presence of calcium and magnesium in water. By passing through various layers of soil and rocks, rain water dissolves some of the mineral substances.

With the portable HI-96741 you can monitor both iron and hardness levels.

In domestic water, iron can alter the taste and make it unpleasant to drink. It can also stain laundry, damage kitchenware and favour the growth of certain bacteria. However, low levels of iron are critical in beverage production.

Hardness is a consequence of the type of rock layers which the water passes through and of its permanence in the water bearing stratum.

Hardness can cause pipe rusting in water heating and cooling systems, reverse osmosis and demineralisation plants. It can also increase the consumption of soaps and detergents in industrial washing machines or laundries.

Key features

  • Clear display messages make the instrument quick and easy to operate
  • The powerful Cal Check calibration function means that there is no need to return the instrument to the laboratory to check its efficiency. Samples can be checked and validation confirmed at the press of a button
  • Positive locking system ensures the cuvette is located in the same position each and every time is it placed in the measurement cell
  • Auto shut off feature turns meter off after 10 minutes of non-use to save battery life
  • Fully water resistant
  • Clear easy to use function buttons
  • Direct readout of parameter measured

Designed for precision

With the Hanna calibration check validation function, users can verify the performance of the meter quickly and easily at any time. Using Hanna NIST traceable standards, it takes just a few moments to check the accuracy of the instrument and to recalibrate as and when necessary.

All new instruments are factory calibrated at source and the electronic and optical design of the Hanna photometers minimises the need for frequent calibration. The Hanna calibration check further minimises the frequency with which instruments need to be returned to the calibration laboratory for full servicing.

Order information

  • Meter only (HI -96741): 2 glass cuvettes, 9V battery

NB: reagents ordered separately

Battery powered – Allows use away from a power source. Batteries are included with all battery operated products.

Water Resistant – Can withstand temporary exposure to water, but should not be submerged or washed under running water.


Specifications list


Range 0.000 to 1.000 mg/L
Resolution 0.001 mg/L
Accuracy ±0.010 mg/L ±7% of reading
Light Source LED 555 nm
Light Life Life of the instrument
Light Detection Silicon Photocell
Battery Type / Life 1 x 9V / approx. 40 hours of continuous use;
auto-off after 10 minutes of non use
Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions 180 x 83 x 46 mm (7.1 x 3.3 x 1.8")
Weight 290 g (10 oz.)
Method Adaptation of the PAN method;
The reaction between nickel and the reagent
causes an orange tint in the sample

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