{"product_id":"horiba-laqua-wq-300-series-smart-handheld-water-quality-meter","title":"Horiba LAQUA WQ-300 Series Smart Handheld Water Quality Meter","description":"\u003cp\u003eThe HORIBA LAQUA WQ-300 Series is a modular handheld platform: one meter body, interchangeable sensor heads, and replaceable sensor cartridges. Instead of buying a separate instrument per parameter, you buy the channel capacity you need and add or swap sensors as your monitoring program changes.\u003c\/p\u003e\n\n\u003cp\u003eThe series measures pH, ORP, ion concentration, dissolved oxygen, conductivity, resistivity, total dissolved solids, salinity and temperature. Sensor heads connect on 2 m or 5 m cables, and each head takes a screw-in cartridge — so when a pH or ion sensor reaches end of life you replace a low-cost cartridge rather than a whole electrode.\u003c\/p\u003e\n\n\u003ch3\u003eHow many channels\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWQ-310\u003c\/strong\u003e — 1 channel. One sensor connected at a time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWQ-320\u003c\/strong\u003e — 2 channels. Two sensors read simultaneously, for example pH and conductivity together.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWQ-330\u003c\/strong\u003e — 3 channels. Three sensors at once, for example pH, conductivity and dissolved oxygen in a single reading.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAll three run on AA alkaline or AA Ni-MH rechargeable batteries. The micro-USB port supplies external power but does not charge batteries. Data logging and printer output are built in.\u003c\/p\u003e\n\n\u003ch3\u003eMeter and case, or complete kit\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMeter with carrying case\u003c\/strong\u003e supplies the instrument and case with no sensors — the right option if you are adding a meter body to sensors you already own, or specifying your own sensor combination from the accessories range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eComplete kits\u003c\/strong\u003e arrive ready to measure:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWQ-310 pH kit\u003c\/strong\u003e — 300-PH-2 pH sensor head (2 m cable) and 300-P-C pH cartridge, pH 4.01 \/ 7.00 \/ 10.01 standards (60 mL), carrying case\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWQ-310 EC kit\u003c\/strong\u003e — 300-C-2 conductivity sensor head (2 m cable) and 300-4C-C four-cell cartridge, conductivity standards at 84 µS\/cm, 1413 µS\/cm, 12.88 mS\/cm and 111.8 mS\/cm (60 mL), carrying case\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWQ-310 DO kit\u003c\/strong\u003e — optical dissolved oxygen sensor head (2 m cable), carrying case\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWQ-320 pH\/EC kit\u003c\/strong\u003e — both pH and conductivity heads and cartridges with all standards above, carrying case\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWQ-320 pH\/DO kit\u003c\/strong\u003e — pH head and cartridge with pH standards, plus optical DO head, carrying case\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWQ-330 pH\/EC\/DO kit\u003c\/strong\u003e — pH, conductivity and optical DO heads with cartridges and all standards, carrying case. The complete three-parameter package.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy optical dissolved oxygen\u003c\/h3\u003e\n\u003cp\u003eThe WQ-300 DO sensor is optical rather than membrane-galvanic. There is no membrane to puncture, no electrolyte to top up, and no stirring dependency — measurement is stable and the only consumable is the replaceable sensor tip. It costs more up front than a galvanic electrode and repays it in maintenance time.\u003c\/p\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEnvironmental monitoring of surface water, groundwater and effluent\u003c\/li\u003e\n\u003cli\u003eDrinking water and wastewater treatment plant process control\u003c\/li\u003e\n\u003cli\u003eIon monitoring for ammonium, nitrate, potassium, calcium and sodium using ISE cartridges\u003c\/li\u003e\n\u003cli\u003eAquaculture and hatchery dissolved oxygen management\u003c\/li\u003e\n\u003cli\u003eIndustrial process, boiler and cooling water control\u003c\/li\u003e\n\u003cli\u003eUltrapure and deionized water verification using resistivity\u003c\/li\u003e\n\u003cli\u003eResearch and teaching laboratories needing one platform across many parameters\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDocumentation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/static.horiba.com\/fileadmin\/Horiba\/Water_Quality\/04_Support\/Brochures\/Handheld_Meters\/LOW-RES_-_ver._2.0_WQSM-08-2019D_LAQUA_WQ-300_Series_Smart_Meter.pdf\"\u003eLAQUA WQ-300 Series brochure and specifications (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/static.horiba.com\/fileadmin\/Horiba\/Water_Quality\/04_Support\/Instruction_Manuals\/Handheld_Meters\/GZ0000574030D_IM_E_WQ-300_series_June_2024.pdf\"\u003eLAQUA WQ-300 Series instruction manual (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/static.horiba.com\/fileadmin\/Horiba\/Water_Quality\/04_Support\/Instruction_Manuals\/Handheld_Meters\/WQ-300_Series_pH_Meter_Quick_Guide.pdf\"\u003eWQ-300 pH meter quick guide (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/static.horiba.com\/fileadmin\/Horiba\/Water_Quality\/04_Support\/Instruction_Manuals\/Handheld_Meters\/WQ-300_Series_Conductivity_Meter_Quick_Guide.pdf\"\u003eWQ-300 conductivity meter quick guide (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eParts \u0026amp; accessories\u003c\/h3\u003e\n\u003cp\u003eSensor heads in 2 m and 5 m cable lengths, pH, conductivity, ORP and ion cartridges (ammonium, nitrate, potassium, calcium, sodium), replacement optical DO sensor tips, BNC adapters and calibration solutions are all stocked — see the \u003ca href=\"https:\/\/envirotechonline.com\/collections\/horiba-parts-accessories\"\u003eHoriba Parts \u0026amp; Accessories\u003c\/a\u003e collection.\u003c\/p\u003e\n\n\u003cp\u003eBrowse all \u003ca href=\"https:\/\/envirotechonline.com\/collections\/horiba\"\u003eHORIBA instruments\u003c\/a\u003e.\u003c\/p\u003e","brand":"Horiba","offers":[{"title":"WQ-310 - 1 Channel - Meter \u0026 Carrying Case Only - 3200832605","offer_id":48226272018622,"sku":"3200832605","price":532.0,"currency_code":"USD","in_stock":true},{"title":"WQ-320 - 2 Channel - Meter \u0026 Carrying Case Only - 3200832606","offer_id":48226272051390,"sku":"3200832606","price":594.0,"currency_code":"USD","in_stock":true},{"title":"WQ-330 - 3 Channel - Meter \u0026 Carrying Case Only - 3200832607","offer_id":48226272084158,"sku":"3200832607","price":656.0,"currency_code":"USD","in_stock":true},{"title":"WQ-310 pH Complete Kit - 5700043026","offer_id":48226272116926,"sku":"5700043026","price":943.0,"currency_code":"USD","in_stock":true},{"title":"WQ-310 Conductivity Complete Kit - 5700043027","offer_id":48226272149694,"sku":"5700043027","price":1066.0,"currency_code":"USD","in_stock":true},{"title":"WQ-310 Optical DO Complete Kit - 5700043028","offer_id":48226272182462,"sku":"5700043028","price":1354.0,"currency_code":"USD","in_stock":true},{"title":"WQ-320 pH + Conductivity Complete Kit - 5700043029","offer_id":48226272215230,"sku":"5700043029","price":1558.0,"currency_code":"USD","in_stock":true},{"title":"WQ-320 pH + Optical DO Complete Kit - 5700043030","offer_id":48226272247998,"sku":"5700043030","price":1835.0,"currency_code":"USD","in_stock":true},{"title":"WQ-330 pH + Conductivity + Optical DO Complete Kit - 5700043031","offer_id":48226272280766,"sku":"5700043031","price":2452.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/csm_WQ-330_d5400c7124.png?v=1785337100","url":"https:\/\/envirotechonline.com\/products\/horiba-laqua-wq-300-series-smart-handheld-water-quality-meter","provider":"EnviroTech Services","version":"1.0","type":"link"}