HM Digital Pro Series Pen-Style pH/Temp Meter - IP-67 Waterproof - 0-14 pH Range

Check Nutrient pH and Temperature in One Pen - 0 to 14 pH Range

Nutrient solution that drifts out of range limits how well plants take up what you feed them, and guessing wastes time. This pen-style meter shows pH and temperature together on one screen, applies automatic temperature compensation, and reads to 0.01 pH with +/- 0.1 pH accuracy.

Sold as a single unit with batteries, a cap, a lanyard and a pH 7.0 buffer sachet included, it suits home growers and small indoor setups, and it works as a handheld spot-check tool for commercial growers who test several reservoirs.

Key Features & Benefits

• IP-67 waterproof housing — submersible and floating, so a drop into a reservoir is not a loss.
• Automatic temperature compensation — readings adjust across a 0-55 °C (32-130 °F) range.
• One-point automatic calibration with digital fine tuning — quick setup between checks.
• Replaceable sensor (model SP-P2) — swap the electrode instead of the whole meter.
• Factory calibrated — three-point checked and set to pH 7.0 before shipping.

Who Should Use HM Digital Pro Series Pen pH/Temp Meter

Anyone running hydroponic systems or testing water and nutrient solutions during vegetative growth or flowering: hobby growers, small-scale indoor cultivators, and commercial teams that want a portable backup meter.

About HM Digital Pro Series Pen pH/Temp Meter

HM Digital model HM-PH-200 is a pen-style pH and temperature meter. It measures 0-14 pH at 0.01 pH resolution with +/- 0.1 pH accuracy, and temperature at 0.1 °C/F resolution. It has replaceable glass sensor and reference tube electrodes and runs on 2 AAA batteries, which are included.

Frequently Asked Questions

Q: What comes in the box?
A: The meter ships with a translucent cap, 2 AAA batteries, a lanyard and a pH 7.0 buffer sachet. You can start testing after unpacking.

Q: Is it waterproof?
A: Yes. The housing carries an IP-67 rating and is submersible, and the meter floats.

Q: Can I replace the sensor?
A: Yes. The electrode is replaceable, and the replacement sensor model is SP-P2. This extends the life of the meter.

Q: What does automatic temperature compensation mean?
A: pH readings shift with solution temperature. Automatic temperature compensation (ATC) adjusts the displayed pH for that shift so readings stay comparable.

Q: How do I calibrate it?
A: It uses one-point automatic calibration with digital fine tuning. Follow the user guide for the exact steps and use fresh buffer solution.

Q: Does it replace an EC meter?
A: No. It measures pH and temperature. Use a separate meter to measure nutrient strength.