{"title":"Meters \u0026 Testing","description":"\u003cp\u003eAccurate pH and EC\/TDS readings are the foundation of a healthy grow. From pocket pH pens to full monitoring systems, our meters and testing gear help you dial in nutrients, catch problems early, and keep your plants thriving from seedling to harvest.\u003c\/p\u003e","products":[{"product_id":"milwaukee-ph55-pro-waterproof-ph-temperature-tester","title":"Milwaukee pH55 PRO Waterproof pH \u0026 Temperature Tester","description":"\u003cp\u003eThe Milwaukee pH55 PRO is a professional-grade waterproof pH and temperature tester built for growers. It features automatic 1 or 2-point calibration, automatic temperature compensation (ATC), and a replaceable double-junction probe for long life and fast response.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003epH range: -2.0 to 16.0 (0.1 resolution, ±0.1 accuracy)\u003c\/li\u003e\n\u003cli\u003eTemperature: -5.0 to 60.0°C \/ 23.0 to 140.0°F\u003c\/li\u003e\n\u003cli\u003eReplaceable Mi56P probe — no need to buy a new meter when the electrode ages\u003c\/li\u003e\n\u003cli\u003eIP65 waterproof, floats if dropped in the reservoir\u003c\/li\u003e\n\u003cli\u003eLarge dual-level LCD, ~300 hours battery life (batteries included)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCare tip:\u003c\/strong\u003e Always store with the cap full of Milwaukee MA9015 storage solution, and calibrate monthly with pH 4.01 and 7.01 buffers.\u003c\/p\u003e","brand":"Milwaukee Instruments","offers":[{"title":"Default Title","offer_id":54255659090203,"sku":"MIL-PH55","price":74.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/PH55_FRONT_WNUMBERS__23584__67929.1612311228.386.513.jpg?v=1792079782"},{"product_id":"bluelab-ph-pen","title":"Bluelab pH Pen","description":"\u003cp\u003eA hardy, compact pH and temperature pen. Perfect for quick and easy pH and temperature readings direct from your solution.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFully waterproof - not just water resistant\u003c\/li\u003e\n\u003cli\u003eSimple two-point calibration process for accuracy\u003c\/li\u003e\n\u003cli\u003eOne-year peace-of-mind warranty\u003c\/li\u003e\n\u003cli\u003eAutomatic temperature compensation for accurate readings everywhere\u003c\/li\u003e\n\u003cli\u003eAuto-off function to extend battery life\u003c\/li\u003e\n\u003cli\u003e1 AAA battery included - simply power on and go\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":54255659122971,"sku":"PENPH","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/ph_pen.jpg?v=1792079785"},{"product_id":"milwaukee-ph56-pro-waterproof-ph-temperature-tester","title":"Milwaukee pH56 PRO Waterproof pH \u0026 Temperature Tester","description":"\u003cp\u003eThe Milwaukee pH56 PRO is Milwaukee's most accurate pocket pH tester, with lab-grade ±0.05 pH accuracy and 0.01 resolution. Automatic calibration with 6 memorized buffer points makes it fast and easy to keep dialed in.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003epH range: -2.00 to 16.00 (0.01 resolution, ±0.05 accuracy)\u003c\/li\u003e\n\u003cli\u003eTemperature: -5.0 to 60.0°C \/ 23.0 to 140.0°F\u003c\/li\u003e\n\u003cli\u003eReplaceable Mi56P double-junction probe\u003c\/li\u003e\n\u003cli\u003eIP65 waterproof, stability indicator and hold function\u003c\/li\u003e\n\u003cli\u003e~300 hours battery life (batteries included)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCare tip:\u003c\/strong\u003e Store with MA9015 storage solution in the cap; calibrate after cleaning or storage.\u003c\/p\u003e","brand":"Milwaukee Instruments","offers":[{"title":"Default Title","offer_id":54255659155739,"sku":"MIL-PH56","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/40423-Milwaukee-pH56-2.jpg?v=1792079786"},{"product_id":"milwaukee-ec59-pro-waterproof-ec-tds-temperature-tester","title":"Milwaukee EC59 PRO Waterproof EC\/TDS \u0026 Temperature Tester","description":"\u003cp\u003eThe Milwaukee EC59 PRO measures conductivity (EC), TDS, and temperature in one waterproof pocket tester — ideal for checking nutrient strength in hydroponic reservoirs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEC range: 0 to 3999 µS\/cm (1 µS resolution, ±2% accuracy)\u003c\/li\u003e\n\u003cli\u003eTDS range: 0 to 2000 ppm\u003c\/li\u003e\n\u003cli\u003eTemperature: 0.0 to 60.0°C \/ 32.0 to 140.0°F with automatic compensation\u003c\/li\u003e\n\u003cli\u003eReplaceable Mi59P stainless steel probe\u003c\/li\u003e\n\u003cli\u003eIP65 waterproof, auto-off after 8 minutes\u003c\/li\u003e\n\u003cli\u003eSupplied with 1413 µS\/cm calibration sachet\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Milwaukee Instruments","offers":[{"title":"Default Title","offer_id":54255659254043,"sku":"MIL-EC59","price":74.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/EC59.jpg?v=1792079789"},{"product_id":"milwaukee-ec60-pro-waterproof-ec-tds-temperature-tester","title":"Milwaukee EC60 PRO Waterproof EC\/TDS \u0026 Temperature Tester","description":"\u003cp\u003eThe Milwaukee EC60 PRO is the high-range version of Milwaukee's EC\/TDS tester, covering up to 20.00 mS\/cm — perfect for concentrated nutrient solutions and commercial reservoirs.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEC range: 0.00 to 20.00 mS\/cm (±2% accuracy)\u003c\/li\u003e\n\u003cli\u003eTDS range: 0.00 to 10.00 ppt\u003c\/li\u003e\n\u003cli\u003eTemperature: 0.0 to 60.0°C \/ 32.0 to 140.0°F with automatic compensation\u003c\/li\u003e\n\u003cli\u003eReplaceable Mi59P probe, IP65 waterproof floating case\u003c\/li\u003e\n\u003cli\u003eDual-level LCD, battery level indicator, auto shut-off\u003c\/li\u003e\n\u003cli\u003eSupplied with 12.88 mS\/cm calibration sachet\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Milwaukee Instruments","offers":[{"title":"Default Title","offer_id":54255659352347,"sku":"MIL-EC60","price":77.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/milwaukee-ec60-pro-wasserdichtes-ec-tds-temp-messgeraet.webp?v=1792079790"},{"product_id":"milwaukee-mw802-3-in-1-ph-ec-tds-combo-meter","title":"Milwaukee MW802 3-in-1 pH\/EC\/TDS Combo Meter","description":"\u003cp\u003eThree meters in one. The Milwaukee MW802 measures pH, EC (conductivity), and TDS with a single probe — one instrument for complete reservoir management.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003epH: 0.00 to 14.00 (±0.20 accuracy)\u003c\/li\u003e\n\u003cli\u003eEC: 0.00 to 6.00 mS\/cm (±2% full scale)\u003c\/li\u003e\n\u003cli\u003eTDS: 0 to 4000 ppm\u003c\/li\u003e\n\u003cli\u003e100% larger easy-read display, ergonomic lightweight case\u003c\/li\u003e\n\u003cli\u003eSupplied with MA850 combination electrode, 9V battery, and pH 7.01 \/ 1500 ppm \/ 1413 µS\/cm calibration sachets\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Milwaukee Instruments","offers":[{"title":"Default Title","offer_id":54255659450651,"sku":"MIL-MW802","price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/MEDIDOR-ECONOMICO-DE-pHCE1.webp?v=1792079794"},{"product_id":"bluelab-soil-ph-pen","title":"Bluelab Soil pH Pen","description":"\u003cp\u003eA hardy handheld solution for measuring soil pH and temperature on the go. Effective in most growing media and in water\/solution. Fully waterproof, one-year warranty, hold reading function, simple two-point calibration, auto-off, automatic temperature compensation, 1x AAA battery included.\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":54255663120667,"sku":"P010007","price":199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/soilphpen.png?v=1792079855"},{"product_id":"bluelab-conductivity-pen","title":"Bluelab Conductivity Pen","description":"\u003cp\u003eHandheld EC\/ppm pen for quick conductivity and temperature readings. Fully waterproof, factory calibrated, one-year warranty, automatic temperature compensation, auto-off function. Measures EC, CF, ppm 500 and ppm 700 scales.\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":54255663218971,"sku":"PENEC","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/conductivity_pen.jpg?v=1792079861"},{"product_id":"bluelab-truncheon-nutrient-meter","title":"Bluelab Truncheon Nutrient Meter","description":"\u003cp\u003eThe original Truncheon - the industry standard for fast EC measurement. No calibration needed, fully waterproof, no buttons or switches. Simply dip into solution and read the flashing LED scale. Measures EC, CF, ppm 500 and ppm 700.\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":54255663350043,"sku":"TRUNCHEON","price":105.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/original_truncheon_meter.jpg?v=1792079868"},{"product_id":"bluelab-commercial-truncheon-meter","title":"Bluelab Commercial Truncheon Meter","description":"\u003cp\u003eCommercial-grade Truncheon with extended EC range for professional growers. Same bulletproof design as the original - no calibration, fully waterproof, LED readout. Wider measurement range for concentrated nutrient solutions.\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":54255663513883,"sku":"TRUNCHEON-COM","price":150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/commercial_truncheon_ae_nutrient_meter.jpg?v=1792079878"},{"product_id":"bluelab-pulse-multimedia-ec-mc-meter","title":"Bluelab Pulse Multimedia EC\/MC Meter","description":"\u003cp\u003eMeasure moisture, conductivity (EC) and temperature directly in the root zone with one click. Stainless steel 20cm probes for soil and substrate. Connects via Bluetooth to the Edenic app for data logging and analysis. No slurry prep needed.\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":54255663612187,"sku":"PULSE","price":349.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/pulse_multimedia_ec-mc_meter.jpg?v=1792079885"},{"product_id":"bluelab-combo-meter","title":"Bluelab Combo Meter","description":"\u003cp\u003eMeasure pH, conductivity (EC) and temperature on the go - all in one handheld unit. Replaceable pH probe, fully waterproof, backlit display, one-year warranty. The complete handheld testing solution for serious growers.\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":54255663710491,"sku":"COMBO","price":339.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/combo_meter.jpg?v=1792079891"},{"product_id":"bluelab-combo-meter-plus-leap-probe-included","title":"Bluelab Combo Meter Plus - Leap Probe Included","description":"\u003cp\u003eThe Combo Meter Plus with fast-response Leap pH probe included. Measure pH directly in soil, coco, rockwool and solution plus EC and temperature. Reinforced spear-tip probe for direct substrate measurement. Bluetooth connectivity to Edenic app.\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":54255663907099,"sku":"COMBO-PLUS","price":389.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/combo_plus_meter_-_probe_included.jpg?v=1792079900"},{"product_id":"bluelab-multimedia-ph-meter-leap-probe-included","title":"Bluelab Multimedia pH Meter - Leap Probe Included","description":"\u003cp\u003eHandheld pH meter with Leap probe for direct measurement in any substrate. Reinforced spear-tip measures pH in soil, coco coir, rockwool, potting mixes and solution in seconds. Double-junction probe, fast response, Bluetooth to Edenic.\u003c\/p\u003e","brand":"Bluelab","offers":[{"title":"Default Title","offer_id":54255664070939,"sku":"MULTIMEDIA-PH","price":209.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/6768\/1563\/files\/multimedia_ph_meter_28leap_probe_included_29.jpg?v=1792079908"}],"url":"https:\/\/ghhydro.com\/collections\/meters-testing.oembed","provider":"Green Harvest Hydroponics","version":"1.0","type":"link"}