APX1-C2 Online pH ORP Controller Brings 3.2 inch LCD and Quick Calibration to Operators

Keeping a pH/ORP controller accurate should not demand specialist training. The APX1-C2 online pH/ORP controller from Daruifuno pairs a clear 3.2 inch graphic LCD with a dedicated quick calibration menu, so routine maintenance takes minutes rather than hours.

Fast, Flexible Calibration

The controller supports pH 3-point calibration using 4.01, 6.86, and 9.18 standard solutions, and ORP 2-point calibration using 86 mV and 256 mV solutions. After selecting a calibration value, the operator can even modify it to match other standard solutions if required.

A quick calibration menu is opened by long-pressing the Enter button on the measurement screen. The sub-display then shows the reset option, the relevant calibration point, and an exit option, so the user can complete the procedure with a single key press per step.

Accurate Temperature Compensation

pH measurement is temperature sensitive. The APX1-C2 provides NTC10K and PT1000 temperature compensation in both automatic and manual modes, keeping readings stable across a temperature range of −10 °C to +150 °C.

Clear Readout, Lasting Settings

Because settings are protected against power loss, the instrument resumes work immediately after an interruption without recalibration or reconfiguration. Applications include laboratories, drinking water monitoring, swimming pools, and aquaculture.

Calibration in Four Simple Steps

1. Clean the probe with deionized cleaning solution and dry it with absorbent paper.
2. Place the probe in the standard solution and wait for the reading to stabilize.
3. Select the matching calibration value, such as 6.86 pH, 4.01 pH, or 9.18 pH.
4. Confirm to complete the point, then move on to the next standard solution.

Because the procedure follows the same logic for both pH and ORP, operators become proficient after a single training session.

Designed Around the Operator

The 3.2 inch graphic LCD presents measurement data on a clear, multi-line screen, and the quick calibration menu is reached with a long press of the Enter button. A reset option, the relevant calibration point, and an exit option appear together, so no deep menu navigation is required.

Where Accuracy Matters Most

Laboratories, drinking water plants, surface water and groundwater monitoring, swimming pools, and aquaculture all benefit from fast, repeatable calibration and stable temperature-compensated readings.

Contact Daruifuno to learn about calibration solutions, compatible probes, and controller bundles.