{"product_id":"apera-grostar-gs4-ph-ec-500ppm-700ppm-temp-5-in-1-combo-pen-tester-gen-ii","title":"Apera GroStar GS4 5-in-1 pH \u0026 EC Combo Pen Tester Gen II | pH, EC, ppm, Temp, TruRead","description":"\u003ch2\u003eApera GroStar® GS4 5-in-1 Combo Pen Tester (Gen II) — pH, EC, ppm \u0026amp; Temperature in One Device\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eApera GroStar GS4 Gen II\u003c\/strong\u003e is the ultimate all-in-one pen tester for growers who want to monitor every critical water quality parameter without carrying multiple meters. In a single dip, the GS4 simultaneously measures \u003cstrong\u003epH, EC, 500 ppm (NaCl), 700 ppm (KCl), and temperature\u003c\/strong\u003e — giving you the complete nutrient and pH picture for your crop, every time.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-in-1 Simultaneous Measurement\u003c\/strong\u003e — pH, EC, 500 ppm, 700 ppm, and temperature in a single probe insertion; replace two meters with one\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Sensor Combo Probe\u003c\/strong\u003e — \u003cstrong\u003eDouble-junction pH sensor\u003c\/strong\u003e for accurate, contamination-resistant pH readings + \u003cstrong\u003etitanium conductivity sensor\u003c\/strong\u003e for reliable, long-life EC\/ppm measurement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaceable Combo Probe\u003c\/strong\u003e — When the probe ages, swap it out — protect your investment without replacing the full pen\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTruRead™ Measurement Mode\u003c\/strong\u003e — Measure across multiple reservoir zones or plant sites and automatically display \u003cstrong\u003eaverage, minimum, and maximum\u003c\/strong\u003e values for comprehensive grow monitoring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual ppm Scales\u003c\/strong\u003e — Supports both \u003cstrong\u003e500 ppm (NaCl)\u003c\/strong\u003e and \u003cstrong\u003e700 ppm (KCl)\u003c\/strong\u003e conversion factors for universal compatibility with any nutrient line or feeding chart\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Point Automatic Calibration\u003c\/strong\u003e — Simple workflow with electrode condition display for real-time probe health monitoring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-Color Backlit LCD\u003c\/strong\u003e — Clear readings in any lighting; color-coded by mode for instant status recognition\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrower-Optimized Design\u003c\/strong\u003e — Streamlined for daily use in grow rooms, greenhouses, and hydroponic systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMeasurements at a Glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003epH\u003c\/strong\u003e — Nutrient solution acidity\/alkalinity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEC\u003c\/strong\u003e — Electrical conductivity (nutrient strength)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e500 ppm\u003c\/strong\u003e — NaCl conversion scale\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e700 ppm\u003c\/strong\u003e — KCl conversion scale\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature\u003c\/strong\u003e — °C \/ °F\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eHydroponics, aquaponics, cannabis cultivation, greenhouse growing, nutrient solution monitoring, reservoir management, coco coir, rockwool, and general water quality testing.\u003c\/p\u003e\n\n\u003ch3\u003eWhy GroStar GS4 Over Separate Meters?\u003c\/h3\u003e\n\u003cp\u003eCarrying a separate pH pen and EC meter means double the calibration, double the maintenance, and double the cost when probes age. The GS4 consolidates everything into one device with a \u003cstrong\u003esingle replaceable combo probe\u003c\/strong\u003e, \u003cstrong\u003edual ppm scales\u003c\/strong\u003e for any nutrient line, and \u003cstrong\u003eTruRead™\u003c\/strong\u003e multi-point averaging — the most grower-intelligent 5-in-1 pen available.\u003c\/p\u003e","brand":"APERA Instruments","offers":[{"title":"Default Title","offer_id":44110972649559,"sku":"GS4","price":179.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1555\/0581\/files\/gs4_ph_ec_combo_-ec_screen.avif?v=1786132535","url":"https:\/\/getultimatenow.com\/products\/apera-grostar-gs4-ph-ec-500ppm-700ppm-temp-5-in-1-combo-pen-tester-gen-ii","provider":"Get Ultimate Now ","version":"1.0","type":"link"}