{"product_id":"aqua-master-e50-pro2-ec-meter-waterproof-ec-temperature-pen","title":"Aqua Master E50 Pro2 EC Meter - Waterproof EC \u0026 Temperature Pen","description":"\u003ch2\u003eKnow Exactly How Strong Your Feed Is with the Aqua Master E50 Pro2 EC Meter\u003c\/h2\u003e\n\u003cp\u003eA nutrient bottle gives you a dose. It doesn't tell you what's actually in the tank. The \u003cstrong\u003eAqua Master E50 Pro2\u003c\/strong\u003e does. It's a waterproof pen that reads EC (electrical conductivity, a measure of how much feed is dissolved in your water) and temperature from \u003cstrong\u003e0.00 to 19.99 mS\/cm\u003c\/strong\u003e, accurate to ±2%. It floats, runs on two AAA batteries and calibrates with any EC calibration solution.\u003c\/p\u003e\n\u003ch3\u003eWhy You Need It\u003c\/h3\u003e\n\u003cp\u003eToo little feed and plants go hungry. Too much and the roots struggle to take up water. Your tap water already carries minerals before a drop of nutrient goes in, so the only way to know your real starting point is to measure it.\u003c\/p\u003e\n\u003cp\u003eEC also tells you how your plants are drinking. If reservoir EC rises between top-ups, they're taking more water than nutrients. If it falls, they're eating faster than they're drinking.\u003c\/p\u003e\n\u003ch3\u003eIs the E50 Pro2 Right for Your Setup?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFirst EC meter:\u003c\/strong\u003e one job, one number, a 30-day calibration reminder and not much to get wrong.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeed pH too?\u003c\/strong\u003e Pair it with the \u003ca href=\"https:\/\/www.onestopgrowshop.co.uk\/products\/aqua-master-p50-ph-temperature-meter\"\u003eAqua Master P50 Pro2 pH Meter\u003c\/a\u003e, or get both readings in one pen with the \u003ca href=\"https:\/\/www.onestopgrowshop.co.uk\/products\/aqua-master-p100-pro-ec-ph-temp-combo-pen\"\u003eP110 Pro2 Combo Pen\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWant PPM?\u003c\/strong\u003e The E50 Pro2 reads EC only. That's no bad thing: EC means the same on every meter, while PPM changes with the scale your meter uses.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow the E50 Pro2 Works\u003c\/h3\u003e\n\u003cp\u003eThe electrode measures how easily a tiny current passes through your solution. More dissolved nutrient means more conductivity and a higher number. Conductivity also climbs with temperature, so ATC (automatic temperature compensation) corrects the reading from 0 to 50°C. You can show 0.01 or 0.1 mS\/cm, but accuracy stays ±2% either way.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIP67 waterproof:\u003c\/strong\u003e it floats, so a dip in the reservoir won't end its career.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibrates with any EC solution:\u003c\/strong\u003e digital manual calibration, so you're not tied to one buffer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e30-day reminder:\u003c\/strong\u003e the CAL tick disappears when it's time to calibrate again.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAAA batteries:\u003c\/strong\u003e two standard AAAs, included, with a low battery warning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaceable electrode:\u003c\/strong\u003e if the sensor wears out, swap it, not the whole meter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAuto power-off:\u003c\/strong\u003e shuts down after 8 minutes to save the batteries.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eContains\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 x E50 Pro2 meter with protective cap and cap cord\u003c\/li\u003e\n\u003cli\u003e2 x 1.5V AAA batteries and user manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNot included: \u003ca href=\"https:\/\/www.onestopgrowshop.co.uk\/products\/aqua-master-calibration-solutions-100ml\"\u003eEC 1.413 calibration solution\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch3\u003eE50 Pro2 Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eEC range\u003c\/th\u003e\n\u003ctd\u003e0.00 to 19.99 mS\/cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eEC accuracy\u003c\/th\u003e\n\u003ctd\u003e±2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eEC resolution\u003c\/th\u003e\n\u003ctd\u003e0.01 or 0.1 mS\/cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTemperature\u003c\/th\u003e\n\u003ctd\u003e0 to 50°C, ±1°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCalibration\u003c\/th\u003e\n\u003ctd\u003eDigital manual, any EC solution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWaterproof rating\u003c\/th\u003e\n\u003ctd\u003eIP67, floats\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePower\u003c\/th\u003e\n\u003ctd\u003e2 x 1.5V AAA, included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSize and weight\u003c\/th\u003e\n\u003ctd\u003e230 x 43 x 43mm, 132g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e1 year meter, 6 months electrode\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eHow To Use the E50 Pro2\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibrate:\u003c\/strong\u003e dip the electrode in EC calibration solution and set the display to the solution's value, following the manual.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest your water:\u003c\/strong\u003e measure plain tap water first so you know your starting EC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMix to target:\u003c\/strong\u003e add nutrients, stir, dip and read. Add more feed or water until you hit your number.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThen do pH:\u003c\/strong\u003e nutrients move pH, so always set EC first.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRinse and cap:\u003c\/strong\u003e rinse the electrode after use and refit the protective cap.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eTop tip:\u003c\/strong\u003e Note your reservoir EC every day. The trend tells you more than any single reading, and it's the quickest way to spot plants that want a stronger or weaker feed.\u003c\/p\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the E50 Pro2 read PPM?\u003c\/strong\u003e\u003cbr\u003eNo, it reads EC in mS\/cm. PPM figures depend on whether a meter uses the 500 or 700 scale, so the same solution can show two different PPM numbers. EC is the same everywhere.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's the difference between the E50 Pro and E50 Pro2?\u003c\/strong\u003e\u003cbr\u003eThe Pro2 runs on AAA batteries instead of button cells and adds a white-on-black display, 0.01 mS\/cm resolution, the 30-day reminder and calibration with any EC solution.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhich calibration solution should I use?\u003c\/strong\u003e\u003cbr\u003eAny EC calibration solution works. Our \u003ca href=\"https:\/\/www.onestopgrowshop.co.uk\/products\/aqua-master-calibration-solutions-100ml\"\u003eAqua Master EC 1.413\u003c\/a\u003e is the easy choice.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNeed help choosing?\u003c\/strong\u003e Call our growing experts on 01782 749955 or visit One Stop Grow Shop Stoke at Fenton Trade Park.\u003c\/p\u003e\n\u003cp\u003eGet the strength right and every feed lands where it should. \u003ca href=\"https:\/\/www.onestopgrowshop.co.uk\/collections\/grow-tools-slash-accessories-meters\"\u003eBrowse our full range of pH and EC meters\u003c\/a\u003e.\u003c\/p\u003e","brand":"AQUA MASTER","offers":[{"title":"Default Title","offer_id":57511627620730,"sku":null,"price":49.99,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/6368\/6447\/files\/aqua-master-tools-e50-pro2-ec-temperature-meter.jpg?v=1793876881","url":"https:\/\/www.onestopgrowshop.co.uk\/products\/aqua-master-e50-pro2-ec-meter-waterproof-ec-temperature-pen","provider":"One Stop Grow Shop","version":"1.0","type":"link"}