can this be submerged 24/7?

Yes it can be in the water 24/7.

Is this a combination pH electrode? Does it have a built-in reference electrode?

It's a BNC type pH electrode with built-in reference.

What input voltage range does this probe use?

They read charged hydrogen (h+) ions that get through a glass membrane. DC Milivolts

How do you calibrate this device? Do you have instruction manual I can take a look at?

It comes with a solution that I haven't used. To calibrate, I use some Atlas Scientific pre-mixed calibrated solutions. I do a 3-point calibration using pH solutions of 4.00, 10.00, and 7.00. I swap out sensors and calibrate once a week. My software has a scale factor and an offset to use the calibration. These are great pH sensors and better than the Atlas Scientific ones I used to use. However, you will have to average over many readings to get accuracy. I take 100 readings, keep the inner 60, and then average. It takes about 7 seconds to do all that.

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Long Body pH Electrode with BNC Socket Probe 300cm Cable 0-14pH for pH Meter, pH Controller pH Device Economical Sensor

Long Body pH Electrode with BNC Socket Probe 300cm Cable 0-14pH for pH Meter, pH Controller pH Device Economical Sensor

Product ID: 104963306

📏300cm extended cable length

🔌Universal BNC socket compatibility

🔬0-14 pH full measurement range

€ 44.03

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Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

📊 Elevate your pH testing game with precision and reach!

COMPACT YET POWERFUL - Slim 1.2cm diameter probe with 14.7cm length fits tight spaces without compromise.
PLUG PLAY SIMPLICITY - BNC socket ensures seamless connection with most pH meters and controllers.
EXTENDED REACH NO LIMITS - 300cm cable lets you test hard-to-reach spots effortlessly.
PRECISION ACROSS THE SPECTRUM - Accurately measures the full pH range from 0.00 to 14.00 for versatile applications.
BUILT TO PROTECT BUILT TO LAST - Protective cap safeguards the sensitive bulb, extending sensor life.

This Long Body pH Electrode features a 300cm cable with a universal BNC socket, enabling precise pH measurements across the full 0-14 range. Designed for diverse environments—from labs to pools—it includes a protective cap for durability and a slim probe for easy access, making it an economical yet professional-grade sensor for all your pH monitoring needs.

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