The Bluelab pH PenPlus is a compact digital pH and temperature meter designed for growers who need dependable readings in hydroponics, fertigation, nutrient solution mixing, reservoirs, irrigation systems, and demanding cultivation environments.
Built with a replaceable pH/temperature probe, this handheld meter helps extend product life by allowing the probe to be swapped when natural probe wear occurs, rather than replacing the entire pen. Its double-junction probe supports reliable measurement performance, while the IP68 dustproof and waterproof design makes it suitable for everyday grow-room, greenhouse, and field use. With a bright backlit display, hold-reading function, simple 2-point calibration, 30-day calibration reminder, and temperature display in °C or °F, the Bluelab pH PenPlus gives growers a practical, long-term tool for maintaining pH confidence in every reading.
Features
- Replaceable pH/temperature probe helps extend the life of the meter
- Double-junction pH probe supports reliable pH measurement
- Screw-cap probe design allows quick probe replacement
- Measures pH and temperature in solution
- pH range: 0.0–14.0 with 0.1 resolution
- pH accuracy: ±0.1 at 25°C / 77°F
- Temperature range: 0–50°C / 32–122°F
- Temperature accuracy: ±1°C / ±2°F
- Bright backlit display for easy reading in work areas
- Hold-reading function helps capture results before recording
- Simple 2-point calibration with 30-day reminder
- KCl-filled silicone cap with internal sponge helps maintain probe hydration
- Integrated lanyard with waterproof silicone probe cap
- Auto-off function helps conserve battery life
- IP68 dustproof and waterproof rating
- Compact handheld design for grow rooms, reservoirs, irrigation systems, and water testing
- Powered by 1x AAA alkaline battery
How to Use
Remove the protective silicone cap and check that the probe is hydrated before use. Rinse the probe with clean water, then place the probe tip into the nutrient solution or water sample being tested. Wait for the reading to stabilise, then use the hold function if you need to capture the result before removing the pen. Rinse the probe after testing, apply the storage cap with the KCl-filled sponge as directed, and store the meter within the recommended temperature range. For best accuracy, perform a 2-point calibration regularly and follow the 30-day calibration reminder. Replace the probe when natural wear affects performance.
Click here to view the Bluelab pH PenPlus User Manual
Why You Should Buy
The Bluelab pH PenPlus is built for growers who want dependable pH monitoring without unnecessary downtime. Its replaceable probe design makes it a smart long-term choice, helping restore meter performance when the probe naturally wears instead of replacing the full device. The waterproof, dustproof IP68 construction, backlit display, compact body, calibration reminder, and temperature reading capability make it a practical tool for daily nutrient solution management, hydroponic growing, greenhouse work, reservoirs, and irrigation testing. For growers who rely on consistent pH data to support nutrient uptake and crop health, the pH PenPlus offers convenience, durability, and confidence in a professional handheld format.
Lifestyle & Use Cases
Ideal for hydroponic growers, greenhouse operators, irrigation system users, commercial cultivation teams, and home growers who need quick, repeatable pH and temperature checks. Use it when mixing nutrients, checking reservoirs, testing runoff, monitoring irrigation water, or maintaining balanced growing conditions across different systems.
FAQs
Is the Bluelab pH PenPlus waterproof?
Yes. The pH PenPlus is built to IP68 standards, meaning it is designed to be dustproof and waterproof.
Can the probe be replaced?
Yes. The pH PenPlus includes a replaceable pH/temperature probe with a screw-cap design, allowing the probe to be swapped when natural wear occurs.
Does it show temperature in both Celsius and Fahrenheit?
Yes. Temperature can be displayed in °C or °F.
How often should it be calibrated?
The meter includes a simple 2-point calibration process and a 30-day calibration reminder to support accurate readings.
How should the probe be stored?
Store the probe hydrated using the KCl-filled silicone cap with internal sponge, following the product care instructions.
What environments is it best suited for?
It is well suited for hydroponics, nutrient solution testing, reservoirs, irrigation systems, greenhouse use, and water testing in grow environments.
