{"product_id":"horiba-laquatwin-conductivity-amp-tds-pocket-meter","title":"Horiba LAQUAtwin Conductivity \u0026 TDS Pocket Meter","description":"\u003cp\u003eThe HORIBA LAQUAtwin conductivity pocket meter measures electrical conductivity — and on the EC-33, total dissolved solids — from a sample as small as 0.12 mL. The patented flat sensor sits on the sample surface instead of needing to be submerged, so you can test a few drops of soil extract, nutrient solution or process water without decanting into a beaker.\u003c\/p\u003e\n\n\u003cp\u003eAll three models are fully waterproof (IP67), calibrate at one button press, and use a user-replaceable sensor so a worn cell does not mean a new meter. Each ships with 1413 µS\/cm and 12.88 mS\/cm calibration solutions (14 mL each), batteries, dropper and storage case.\u003c\/p\u003e\n\n\u003ch3\u003eChoose your model\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLAQUAtwin EC-11\u003c\/strong\u003e (part no. 3999960125) — conductivity only, 2-point calibration. Range 0–1999 µS\/cm and 2.00–19.99 mS\/cm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLAQUAtwin EC-22\u003c\/strong\u003e (part no. 3999960126) — conductivity and temperature, 3-point calibration. Extends the range to 20.0–199.9 mS\/cm for high-salinity samples.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLAQUAtwin EC-33\u003c\/strong\u003e (part no. 3999960127) — conductivity, TDS and temperature, 3-point calibration. Same wide EC range plus a direct TDS readout from 0 to 9900 ppm.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eConductivity or TDS?\u003c\/h3\u003e\n\u003cp\u003eConductivity is the raw measurement; TDS is a calculated estimate of dissolved solids derived from it. If your records, permit or customer specification is written in ppm rather than µS\/cm, choose the EC-33 so the meter does the conversion for you. If you only ever report in µS\/cm or mS\/cm, the EC-11 or EC-22 is all you need.\u003c\/p\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHydroponic and fertigation nutrient solution strength checks\u003c\/li\u003e\n\u003cli\u003eSoil salinity testing from a saturated paste or 1:5 extract\u003c\/li\u003e\n\u003cli\u003eBoiler, cooling tower and process water monitoring\u003c\/li\u003e\n\u003cli\u003eReverse osmosis and deionized water quality verification\u003c\/li\u003e\n\u003cli\u003eSurface water, runoff and stormwater salinity spot checks\u003c\/li\u003e\n\u003cli\u003eFood and beverage QC on small or concentrated samples\u003c\/li\u003e\n\u003cli\u003eAquaculture and greenhouse irrigation water monitoring\u003c\/li\u003e\n\u003cli\u003eTeaching laboratories and field training\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\/Pocket_Meters\/Brochure_-_PBT-02-2017A_LAQUAtwin_Pocket_Water_Quality_Meter_-_LOWRES.pdf\"\u003eLAQUAtwin pocket meter brochure and specifications (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eParts \u0026amp; accessories\u003c\/h3\u003e\n\u003cp\u003eReplacement S070 conductivity sensors, 1.41 mS\/cm and 12.9 mS\/cm standard solution sets, sampling sheets and the 6-meter carrying case 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":"EC-11 - Conductivity, 2-point calibration - 3999960125","offer_id":48226151858366,"sku":"3999960125","price":133.0,"currency_code":"USD","in_stock":true},{"title":"EC-22 - Conductivity\/Temp, 3-point calibration - 3999960126","offer_id":48226151891134,"sku":"3999960126","price":154.0,"currency_code":"USD","in_stock":true},{"title":"EC-33 - Conductivity\/TDS\/Temp, 3-point calibration - 3999960127","offer_id":48226151923902,"sku":"3999960127","price":175.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/csm_Product_image_EC-33B_ec10d4b3c5.png?v=1785336959","url":"https:\/\/envirotechonline.com\/products\/horiba-laquatwin-conductivity-amp-tds-pocket-meter","provider":"EnviroTech Services","version":"1.0","type":"link"}