HI7021L | Hanna ORP Test Solution 240mV - 500ml

Verify the accuracy of your oxidation-reduction potential measurements with the Hanna HI7021L ORP Test Solution, the essential diagnostic standard for water quality professionals in Pakistan. Unlike pH electrodes, ORP probes cannot be "calibrated" in the traditional sense; instead, their accuracy must be verified against a known standard to ensure the platinum or gold sensor is clean and functioning correctly.

The HI7021L provides a stable reference value of 240 mV at 25°C, making it perfect for testing ORP electrodes used in swimming pools, wastewater treatment, and plating baths. Manufactured to strict industry standards, this 500 mL bottle allows you to quickly determine if your probe needs cleaning or replacement. It comes in an air-tight, tamper-proof bottle to ensure the solution remains fresh and reliable for critical system checks.

Frequently Asked Questions:

Q: Can I use this to calibrate my ORP meter?

A: Generally, no. Most ORP meters do not have a calibration function because the millivolt reading is absolute. The HI7021L is used as a diagnostic tool. If your probe reads 240 mV ±20 mV in this solution, it is working well. If the reading is far off, the probe likely needs cleaning (HI7061) or pretreatment (HI7091/HI7092).

Q: Why is 240 mV the standard value?

A: 240 mV is a standard potential that falls within the typical range of many oxidative processes (like chlorination checks), providing a realistic reference point for verifying sensor response.

Q: How long can I keep the bottle open?

A: ORP solutions are sensitive to contamination. We recommend keeping the bottle tightly capped when not in use and replacing the solution every 3–6 months after opening to ensure the millivolt value remains stable.

Buy Now: Eliminate uncertainty from your redox measurements. Order the authentic Hanna HI7021L ORP Test Solution exclusively at Kamadi Pakistan for the best price, fresh stock, and official warranty support!