Can this pro be totally submerged underwater? What is the recommended depth of placement?

Yes it can be submerged. There is no recommended depth beyond simply ensuring the sensor on the tip is exposed to the test sample. The cable is 3 feet long.

Can this probe be left in contact with pool water indefinitely?

No, the chlorine is corrosive and will ruin the sensor.

will this work with chemtrol and do you offer an ORP probes

If by chemtrol you mean monitoring wall-mounted meters, then we would recommend the 201DJ-C instead. It features more durable and enduring design for long-term water testing and less likelihood of losing calibration to turbulent water as quickly as the 201-C. Yes, there is an ORP probe, the Apera 301PT-C.

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⚡ Measure smarter, faster, greener — pH precision redefined!

ECO CONSCIOUS CHOICE - Carbonfree certified for professionals who value sustainability without compromise
SEAMLESS CONNECTIVITY - Standard BNC connector ensures easy integration with your existing lab setup
EFFORTLESS MAINTENANCE - Gel KCL electrolyte means zero refilling—focus on results, not upkeep
RAPID RELIABLE READINGS - Special lithium glass membrane delivers quick, stable pH measurements every time
DURABILITY MEETS PRECISION - Polycarbonate body paired with a detachable sensor shield guards against accidental damage

The APERA INSTRUMENTS 201-C is a high-performance combination pH electrode featuring a lithium glass membrane for rapid, stable readings, a low-impedance 50Ω design for swift response, and a gel KCL electrolyte that eliminates refilling. Its durable polycarbonate body and detachable sensor shield protect the sensitive glass membrane, while the standard BNC connector ensures compatibility with most pH meters. Certified carbonfree, it’s the ideal choice for eco-conscious professionals demanding accuracy and reliability.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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