{"product_id":"bluelab-ph-penplus","title":"Bluelab pH PenPlus","description":"\u003cp\u003eBluelab pH PenPlus is a handheld pH and temperature pen for measuring nutrient solution and runoff in hydroponic and irrigated growing systems. This digital measurement tool is built for growers who want quick, confident readings while keeping pH and temperature information close at hand. With a compact handheld design, bright backlit display, and hold-reading function, it supports clear daily decision-making in solution-based growing environments.\u003c\/p\u003e\n\u003cp\u003eThe key upgrade is its replaceable pH\/Temperature probe, which helps extend product life when natural probe wear occurs. A double-junction pH probe supports reliable measurements, while the screw-cap probe design makes the probe a serviceable component of the pen. The KCl-filled silicone cap with internal sponge helps maintain probe hydration, and the integrated lanyard with waterproof silicone probe cap keeps the pen practical for busy grow spaces.\u003c\/p\u003e\n\u003cp\u003eFor plant health, the Bluelab pH PenPlus helps growers understand nutrient solution pH and temperature so the root zone can stay in the right range for nutrient uptake. In hydroponic and irrigated systems, pH influences how available nutrients are to the plant. Runoff pH and temperature readings can help identify changes around the roots, giving growers better visibility before growth conditions drift too acidic or too alkaline.\u003c\/p\u003e\n\u003cp\u003eThis pH and temperature pen also includes a calibration reminder, auto-off function, and IP68 dustproof and waterproof rating. The display is designed for easy reading, and temperature can be viewed in either Celsius or Fahrenheit. Its handheld format suits both home growers and commercial growers who need a reliable pH pen for solution measurement without a connected app requirement.\u003c\/p\u003e\n\u003cp\u003eBluelab pH PenPlus is a good fit for growers managing nutrient solution, runoff, and root-zone pH visibility in hydroponic or irrigated setups. It brings together a replaceable probe, waterproof handheld design, and dependable pH confidence in a compact tool made for long-term grow room measurement.\u003c\/p\u003e\n\u003cp\u003eHow to use:\u003cbr\u003eBefore first use:\u003cbr\u003eBefore using the pen for the first time, the probe must be hydrated and calibrated.\u003c\/p\u003e\n\u003cp\u003eRemove the storage cap and place the probe tip in Bluelab pH Probe KCl Storage Solution for 24 hours. After hydration, rinse the probe tip in fresh water, then calibrate the pen before taking a reading.\u003c\/p\u003e\n\u003cp\u003eDo not let the probe tip dry out.\u003c\/p\u003e\n\u003cp\u003eHow to turn the pen on and off:\u003cbr\u003eShort press the power button to turn the pen on.\u003c\/p\u003e\n\u003cp\u003eShort press the power button while the pen is on to hold the reading on the screen.\u003c\/p\u003e\n\u003cp\u003eLong press the power button to turn the pen off.\u003c\/p\u003e\n\u003cp\u003eThe pen also has an auto-off function to help save battery life.\u003c\/p\u003e\n\u003cp\u003eChanging temperature units:\u003cbr\u003eHold the units button until the temperature unit flashes.\u003c\/p\u003e\n\u003cp\u003eShort press the units button to switch between °C and °F.\u003c\/p\u003e\n\u003cp\u003eThe screen will return to normal after a few seconds.\u003c\/p\u003e\n\u003cp\u003eHow to calibrate the pen:\u003cbr\u003eCalibration is required before first use, after cleaning and hydration, after replacing the probe, when the reading seems unexpected, or when the calibration check mark disappears from the screen.\u003c\/p\u003e\n\u003cp\u003eUse fresh Bluelab pH 7.0 calibration solution first. Place the probe tip into the pH 7.0 solution, then hold the CAL button until “CAL” appears on the display. Release the button and leave the probe in the solution while the display flashes. When flashing stops, the pH 7 calibration point is complete.\u003c\/p\u003e\n\u003cp\u003eRinse the probe tip in clean tap water and gently shake off excess water.\u003c\/p\u003e\n\u003cp\u003eNext, place the probe tip into fresh Bluelab pH 4.0 calibration solution. If your readings are normally above pH 7.0, pH 10.0 calibration solution may be used instead of pH 4.0. Hold the CAL button until “CAL” appears, then release the button and leave the probe in the solution while the display flashes. When flashing stops, the second calibration point is complete.\u003c\/p\u003e\n\u003cp\u003eA check mark on the display confirms a successful calibration. The check mark disappears after 30 days as a reminder to recalibrate.\u003c\/p\u003e\n\u003cp\u003eThe pH PenPlus must be calibrated to 2 points. Always calibrate to pH 7 first, then pH 4 or pH 10. The pen will not hold calibration if only calibrated to pH 7.\u003c\/p\u003e\n\u003cp\u003eAfter each use:\u003cbr\u003eRinse the probe tip with fresh water before replacing the storage cap.\u003c\/p\u003e\n\u003cp\u003eAdd 3–5 drops of Bluelab pH Probe KCl Storage Solution to the sponge inside the silicone storage cap to keep the probe moist.\u003c\/p\u003e\n\u003cp\u003ePlace the storage cap securely back onto the probe tip.\u003c\/p\u003e\n\u003cp\u003eDo not store the probe in reverse osmosis water, distilled water, or de-ionized water.\u003c\/p\u003e\n\u003cp\u003eRegular cleaning:\u003cbr\u003eTo keep readings accurate, clean the probe regularly.\u003c\/p\u003e\n\u003cp\u003eRinse the probe tip under fresh water.\u003c\/p\u003e\n\u003cp\u003eFill a small container with clean water and add a small amount of Bluelab pH Probe Cleaner or mild dishwashing liquid.\u003c\/p\u003e\n\u003cp\u003eGently stir the probe tip in the cleaning mixture. Do not knock the probe against the side of the container.\u003c\/p\u003e\n\u003cp\u003eRinse well under fresh running water to remove all cleaner or detergent.\u003c\/p\u003e\n\u003cp\u003eFor heavier buildup, gently brush around the glassware with a few drops of Bluelab pH Probe Cleaner or mild detergent using a soft toothbrush. Rinse well afterward.\u003c\/p\u003e\n\u003cp\u003eAfter cleaning, hydrate the probe and calibrate the pen before taking readings.\u003c\/p\u003e\n\u003cp\u003eStorage:\u003cbr\u003eFor normal storage, keep the probe tip moist inside the storage cap. Add 3–5 drops of KCl storage solution to the sponge inside the cap once a week.\u003c\/p\u003e\n\u003cp\u003eFor long-term storage, remove the storage cap, stand the pen upright in a plastic container, and cover the probe tip with Bluelab pH Probe KCl Storage Solution. Check the container regularly and top up as needed.\u003c\/p\u003e\n\u003cp\u003eIf the probe tip has dried out, hydrate it in Bluelab pH Probe KCl Storage Solution for 24 hours.\u003c\/p\u003e\n\u003cp\u003eAfter hydration, calibrate the pen to check whether the probe is still working correctly.\u003c\/p\u003e\n\u003cp\u003eProbe care warnings:\u003cbr\u003eDo not let the probe tip dry out.\u003c\/p\u003e\n\u003cp\u003eDo not touch the glass bulb with your fingers.\u003c\/p\u003e\n\u003cp\u003eDo not knock or drop the pen, as this can damage the glass probe.\u003c\/p\u003e\n\u003cp\u003eDo not place a cold probe into hot liquid, or a hot probe into cold liquid.\u003c\/p\u003e\n\u003cp\u003eDo not soak or rinse the pH probe in reverse osmosis water, distilled water, or de-ionized water.\u003c\/p\u003e\n\u003cp\u003eDo not immerse the probe in oils, proteins, or heavy suspended solids that may coat the glass bulb.\u003c\/p\u003e\n\u003cp\u003eReplacing the probe:\u003cbr\u003eThe pH PenPlus uses a replaceable Bluelab pH ProbePlus.\u003c\/p\u003e\n\u003cp\u003eReplace the probe if it is damaged or can no longer be calibrated.\u003c\/p\u003e\n\u003cp\u003eTo replace the probe, turn the pen off and remove the storage cap. Unscrew the collar, pull out the old probe, insert the replacement probe, then screw the collar back on until firmly attached.\u003c\/p\u003e\n\u003cp\u003eHydrate and calibrate the new probe before taking readings.\u003c\/p\u003e\n\u003cp\u003eBattery replacement:\u003cbr\u003eThe pH PenPlus uses 1 AAA alkaline battery. Do not use rechargeable batteries.\u003c\/p\u003e\n\u003cp\u003eWhen the low battery symbol appears, replace the battery.\u003c\/p\u003e\n\u003cp\u003eRemove the battery cap, take out the old battery, and check for corrosion. Insert a new AAA alkaline battery with the positive end facing down into the body.\u003c\/p\u003e\n\u003cp\u003eMake sure the waterproof battery cap seal is clean before replacing the cap. Tighten the battery cap until there is no gap between the cap and the body.\u003c\/p\u003e\n\u003cp\u003eBasic troubleshooting:\u003cbr\u003eIf readings slowly drift, clean the probe, hydrate it, and recalibrate.\u003c\/p\u003e\n\u003cp\u003eIf calibration fails, use fresh calibration solutions, clean the probe, hydrate it, and try again.\u003c\/p\u003e\n\u003cp\u003eIf the pen shows a similar pH in all calibration solutions, the probe may be damaged and may need replacement.\u003c\/p\u003e\n\u003cp\u003eIf readings jump around, make sure the probe tip is properly immersed in the test solution.\u003c\/p\u003e\n\u003cp\u003eIf readings remain incorrect after successful calibration, clean and hydrate the probe, then recalibrate. If the issue continues, the probe may need replacement.\u003c\/p\u003e\n\u003cp\u003eProduct benefits: Indoor; Accuracy; Plant Health; Easy Setup; Compact; Consistent Results; Long-Lasting; Consistent Performance.\u003c\/p\u003e\n\u003cp\u003eSpecifications: pH Range: 0 - 14 pH; pH Resolution: 0.1 pH; pH Accuracy: ±0.1 pH; Temperature Range: 0.0 - 50.0 °C; Temperature Accuracy: ±1 °C; Temperature Accuracy: ±2 °C; Operating Temperature: 0 - 50 °C; Battery Type: AAA; Waterproof Rating: IP-68; Inside The Box:; pH Pen: 1; Calibration Solution 7.0: 1; Calibration Solution 4.0: 1; Storage Solution: 1.\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":47179135680668,"sku":null,"price":174.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/0300\/8412\/files\/BluelabpHPenPlus.webp?v=1783617145","url":"https:\/\/provisiongardens.com\/products\/bluelab-ph-penplus","provider":"Provision Gardens","version":"1.0","type":"link"}