{"product_id":"aqua-master-p160-pro-replacement-electrode","title":"P160 Pro Replacement Electrode by Aqua Master Tools — 5-in-1 pH, EC, TDS, PPM \u0026 Temperature Probe for the P160 Pro and P160 Pro2 Combo Pens","description":"\u003cdiv style=\"font-family: 'Helvetica Neue', Arial, sans-serif; max-width: 860px; margin: 0 auto; color: #1a1a1a;\"\u003e\n\n\u003cp style=\"font-size: 1.05rem; line-height: 1.7; margin-bottom: 1.5rem;\"\u003eThe P160 is the pen that does everything, which also means every reading it gives you comes off one electrode. pH, EC, TDS, PPM and temperature all live in this part, so when the glass bulb tires or the conductivity rings scale up, the whole pen goes vague at once. This is the genuine Aqua Master Tools replacement electrode (part AMT1019) for the P160 Pro and P160 Pro2 combo pens. It is the same 5-in-1 sensor the pen shipped with, it is IP67 waterproof once fitted, it swaps over by hand in a couple of minutes, and it costs well under half of a new pen. It is a dry-storage electrode like the original, so no KCl cap is needed day to day.\u003c\/p\u003e\n\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 2rem; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cstrong style=\"color: #2e5e2e;\"\u003eSoak it before you use it.\u003c\/strong\u003e Aqua Master ships this electrode dry, and dried salt around the glass is normal. Stand the new electrode in tap water for at least 12 hours before fitting it, then calibrate both pH and EC. Skip the soak and the first readings will wander.\u003c\/div\u003e\n\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 2rem;\"\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eFits the P160 Pro and P160 Pro2\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eAqua Master makes one P160 electrode (AMT1019) and it fits both generations of the combo pen. It does not fit the P110, which uses its own part.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eAll five readings from one part\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003epH glass, EC rings and the temperature sensor sit in one cartridge. One swap brings back every number the P160 reads, not just pH.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eWell under half the price of a new pen\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eThe electrode is the only wearing part. The body, display, case and calibration solutions you already own carry on as they were.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eNo tools, no soldering\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eUnscrew the sealing ring at the base of the pen, pull the old electrode, seat the new one with the recess lined up, tighten the ring. Done.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eDry storage, IP67 once fitted\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eNo storage solution needed between uses, and with the seal seated and the ring tight the pen gets its full waterproof rating back.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f4f9f4; border-left: 4px solid #2e5e2e; padding: 1rem 1.2rem; border-radius: 6px;\"\u003e\n\u003cstrong style=\"display: block; margin-bottom: 0.3rem; color: #2e5e2e;\"\u003eGenuine part, six-month warranty\u003c\/strong\u003e\u003cspan style=\"font-size: 0.9rem; color: #444;\"\u003eAqua Master Tools warrants the electrode for six months. Fitting a part from another brand voids the pen's warranty, so this is the only one worth using.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eSpecifications\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem 2rem; font-size: 0.95rem;\"\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Aqua Master Tools\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e AMT1019\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e P160 Pro and P160 Pro2 combo pens\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eMeasures:\u003c\/strong\u003e pH, EC, TDS, PPM and temperature\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eSensor:\u003c\/strong\u003e Glass pH bulb, conductivity electrodes and temperature sensor in one cartridge\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eStorage type:\u003c\/strong\u003e Dry storage, no liquid needed between uses\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWaterproof rating:\u003c\/strong\u003e IP67 when fitted to the pen\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eFitting:\u003c\/strong\u003e Tool-free, via the pen's sealing ring\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eBefore first use:\u003c\/strong\u003e Soak in tap water for 12 hours, then calibrate\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eCalibration after fitting:\u003c\/strong\u003e pH 2-point auto (7.00 then 4.01); EC manual with any EC standard (1413 supplied with the pen)\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 6 months on the electrode\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cstrong\u003eEAN:\u003c\/strong\u003e 8785258333743\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eGrower's Tip\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"background: #fff8e1; border-left: 4px solid #f9a825; padding: 1rem 1.3rem; border-radius: 6px; margin-bottom: 0;\"\u003e\n\u003cul style=\"margin: 0 0 0 1.2rem; padding: 0; font-size: 0.93rem; line-height: 1.7;\"\u003e\n\u003cli\u003eBefore you buy, clean and recalibrate. A bulb coated in nutrient film or EC rings furred with scale behave exactly like a worn electrode. Ten minutes in electrode cleaner, a rinse, then fresh pH 7, pH 4 and EC standard. If both modes calibrate and hold, you did not need a new electrode.\u003c\/li\u003e\n\u003cli\u003eSigns it really is worn: pH will not calibrate or drifts in a stable buffer, EC will not return to zero in clean water, the response time has blown out to a minute or more, or the glass is cracked or chipped.\u003c\/li\u003e\n\u003cli\u003eAqua Master's own fix for an EC reading that will not drop back to zero is a short swirl in ethyl alcohol (5 to 10 seconds). Try that before you condemn the electrode.\u003c\/li\u003e\n\u003cli\u003eCalibrate both modes after fitting, even if you mostly use one. The EC side can be calibrated with any EC standard because the P160's EC calibration is not temperature dependent, so the 2.76 EC Flairform standard works as well as the 1413 solution in the pen's case.\u003c\/li\u003e\n\u003cli\u003eUse fresh buffer and standard for the first calibration on a new electrode. Solutions that have been dipped a dozen times are contaminated and will calibrate the new sensor to a wrong number.\u003c\/li\u003e\n\u003cli\u003eRinse the electrode with water after every reading and put the cap back on. Dried nutrient salts on the glass and the EC rings are the main reason combo electrodes wear out early.\u003c\/li\u003e\n\u003cli\u003eDo not plunge a cold electrode into hot liquid or the other way round. Sudden temperature swings can crack the glass bulb, and that is not covered by warranty.\u003c\/li\u003e\n\u003cli\u003eCheck the rubber seal is seated before you tighten the sealing ring. A mis-seated seal is how water gets into the pen, and water damage is not a warranty claim either.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eHow To Fit It\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e1\u003c\/span\u003e\u003cspan\u003eSoak the new electrode in tap water for at least 12 hours. This dissolves the dried salts and activates the glass. Do this before you touch the pen.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e2\u003c\/span\u003e\u003cspan\u003eTurn the pen off, take the cap off and unscrew the sealing ring at the lower end of the meter.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e3\u003c\/span\u003e\u003cspan\u003ePull the old electrode straight out. Gently. It is a push fit onto connector pins, not a thread.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e4\u003c\/span\u003e\u003cspan\u003eLine up the recess on the new electrode with the pen body and push it home so the connectors mate properly. Forcing it in the wrong way round damages the pins.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; border-bottom: 1px solid #edf3ed; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e5\u003c\/span\u003e\u003cspan\u003eCheck the rubber seal is sitting flat, then screw the sealing ring back on tight. This is what gives you the IP67 rating back.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: flex-start; gap: 14px; padding: 12px 0; font-size: 0.93rem; line-height: 1.6;\"\u003e\n\u003cspan style=\"background: #2e5e2e; color: #fff; font-weight: 700; font-size: 0.85rem; min-width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 1px;\"\u003e6\u003c\/span\u003e\u003cspan\u003eCalibrate pH first (2-point auto, pH 7.00 then pH 4.01), then switch to EC mode and calibrate against your EC standard, as described in the manual. The pen is ready once both calibrations are confirmed.\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin: 1rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eWant to see it done first? \u003ca href=\"https:\/\/www.youtube.com\/watch?v=MR_Nq81lPM8\" target=\"_blank\" rel=\"noopener\" style=\"color: #2e5e2e; font-weight: 600;\"\u003eWatch Aqua Master Tools' electrode replacement video on YouTube\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003ePairs Well With\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem;\"\u003e\n\u003ca href=\"\/products\/aqua-master-tools-p160-pro2-combo-pen\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eAqua Master P160 Pro2 Combo Pen\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eThe pen this electrode fits. If the body or display has given up rather than the sensor, this is the fix instead.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/flairform-ph-buffer-7\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eFlairform pH Buffer 7.0\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eFirst point of the P160's 2-point pH calibration. Fresh buffer for a fresh electrode.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/flairform-ph-buffer-4\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eFlairform pH Buffer 4.0\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eSecond pH calibration point. You need both to calibrate the pH side properly.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/flairform-conductivity-standard\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eFlairform Conductivity Standard 2.76 EC\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eFor the EC side. The P160 calibrates EC against any standard, so this works in place of the 1413 solution once that runs out.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/products\/flairform-electrode-cleaner\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eFlairform Electrode Cleaner\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eClean the bulb and EC rings before you condemn them. Regular cleaning is what makes the next electrode outlast the last one.\u003c\/p\u003e\u003c\/a\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"text-decoration: none; color: inherit; background: #f4f9f4; border: 1px solid #c8dfc8; padding: 1rem; border-radius: 6px; display: block;\"\u003e\u003cstrong style=\"color: #2e5e2e; display: block; margin-bottom: 0.3rem;\"\u003eMeters \u0026amp; Pens – pH \u0026amp; EC Testing\u003c\/strong\u003e\u003cp style=\"font-size: 0.85rem; margin: 0;\"\u003eEvery pH, EC and combo pen we stock, plus the probes and solutions that keep them honest.\u003c\/p\u003e\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"margin-bottom: 2rem;\"\u003e\n\u003csummary style=\"cursor: pointer; border-bottom: 2px solid #2e5e2e; padding-bottom: 0.4rem; margin-bottom: 1rem;\"\u003e\u003ch2 style=\"font-size: 1.1rem; font-weight: 700; margin: 0; display: inline;\"\u003eFrequently Asked Questions\u003c\/h2\u003e\u003c\/summary\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes this electrode fit the P160 Pro2 as well as the original P160 Pro?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. Aqua Master Tools makes a single P160 electrode, part AMT1019, and lists it as the replacement for both the P160 Pro and the P160 Pro2. The Pro2 changed the display, batteries and firmware, not the electrode.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWill it fit the P110 combo pen? They look the same.\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The P110 uses its own electrode (AMT1014) and Aqua Master states the two are not interchangeable. The P160 also calculates TDS and PPM, which the P110 does not, so the electronics expect the right part. Check the model name printed on the front of your pen.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes one electrode really replace pH, EC, TDS, PPM and temperature?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes. The pH glass, the conductivity electrodes and the temperature sensor are built into this one cartridge. TDS and PPM are calculated from the EC reading, so once pH and EC are calibrated, all five numbers are back.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eHow do I know the electrode is worn and not just dirty?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eClean it first. Soak the tip in electrode cleaner, rinse, then calibrate pH in fresh pH 7 and pH 4 buffers and EC in fresh standard. If pH still will not calibrate or drifts in a stable buffer, or EC will not come back to zero in clean water even after a swirl in ethyl alcohol, the electrode has had its day.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo I need any tools to replace it?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The sealing ring at the base of the pen unscrews by hand, the old electrode pulls straight out and the new one pushes in. Aqua Master's own instructions are seven steps and most of them are \"check the seal\" and \"calibrate\".\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDo I have to recalibrate both pH and EC after fitting it?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes, both. The calibration stored in the pen belongs to the old electrode. Soak the new one for 12 hours, fit it, run the 2-point pH calibration, then switch to EC mode and calibrate against your EC standard before you trust a reading.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eDoes it need storage solution in the cap like a normal pH probe?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eNo. The P160 electrode is a dry-storage type, the same as the one the pen shipped with. Rinse it after use, cap it and put it away. The one exception is the 12-hour tap water soak before first use.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eWhy does the new electrode have white crust on it?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eThat is dried salt from the electrode's internal solution and Aqua Master says it is normal. The 12-hour soak in tap water dissolves it and rehydrates the glass. It is not a fault and it is not a sign the part is old.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 0.8rem; border: 1px solid #e0e0e0; border-radius: 6px; padding: 0.8rem 1rem;\"\u003e\u003csummary style=\"font-weight: 600; cursor: pointer;\"\u003eIs the pen still waterproof with a replacement electrode?\u003c\/summary\u003e\u003cp style=\"margin: 0.6rem 0 0; font-size: 0.93rem; line-height: 1.6;\"\u003eYes, provided the rubber seal is seated and the sealing ring is done up tight. Aqua Master rates the electrode IP67 when attached to the meter, the same as the pen out of the box.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/details\u003e\n\n\u003cdiv style=\"background: #1c3a1c; color: #fff; padding: 2rem; border-radius: 10px; text-align: center; margin-top: 2rem;\"\u003e\n\u003ch2 style=\"color: #fff !important; margin: 0 0 0.5rem; font-size: 1.3rem;\"\u003eFive readings back for the price of one part\u003c\/h2\u003e\n\u003cp style=\"color: #aed1ae !important; margin: 0 0 1.5rem; font-size: 0.95rem;\"\u003eGenuine Aqua Master Tools P160 electrode, shipped from Tasmania. Free shipping over $499*.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap;\"\u003e\n\u003cbutton id=\"btn-add-to-cart\" style=\"background: #b67317 !important; color: #fff !important; padding: 0.85rem 2rem !important; border: none !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 700 !important; cursor: pointer !important;\"\u003eAdd to Cart\u003c\/button\u003e\n\u003ca href=\"\/collections\/meters-pens-ph-ec-testing\" style=\"background: transparent !important; color: #fff !important; padding: 0.85rem 2rem !important; border: 2px solid #fff !important; border-radius: 6px !important; font-size: 1rem !important; font-weight: 600 !important; text-decoration: none !important; display: inline-block !important;\"\u003eShop All Meters \u0026amp; Pens\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript\u003e\ndocument.addEventListener('DOMContentLoaded', function() {\n  var btn = document.getElementById('btn-add-to-cart');\n  if (!btn) return;\n  btn.addEventListener('click', function() {\n    fetch('\/cart\/add.js', {\n      method: 'POST',\n      headers: {'Content-Type': 'application\/json'},\n      body: JSON.stringify({id: parseInt('53474209759530', 10), quantity: 1})\n    }).then(function(response) {\n      return response.json();\n    }).then(function(data) {\n      if (data.status \u0026\u0026 data.status !== 200) { throw new Error(data.description); }\n      btn.textContent = 'Added to Cart';\n      btn.style.background = '#2e5e2e';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2000);\n    }).catch(function() {\n      btn.textContent = 'Error — Try Again';\n      btn.style.background = '#c0392b';\n      setTimeout(function() {\n        btn.textContent = 'Add to Cart';\n        btn.style.background = '#b67317';\n      }, 2500);\n    });\n  });\n});\n\u003c\/script\u003e\n","brand":"Aqua Master Tools","offers":[{"title":"Default Title","offer_id":53474209759530,"sku":"AMT-METER-ELEC-P160PRO","price":99.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0847\/1573\/3290\/files\/aqua-master-p160-pro-replacement-electrode-amt1019.jpg?v=1793914181","url":"https:\/\/www.thegrowguys.com.au\/products\/aqua-master-p160-pro-replacement-electrode","provider":"The Grow Guys","version":"1.0","type":"link"}