{"product_id":"horiba-laquatwin-ion-selective-pocket-meter","title":"Horiba LAQUAtwin Ion-Selective Pocket Meter","description":"\u003cp\u003eThe HORIBA LAQUAtwin ion-selective pocket meters measure a specific ion — nitrate, sodium, potassium, calcium or fluoride — directly in the field from a sample as small as 0.3 mL, or 0.05 mL using a sampling sheet. Each uses an ion-selective electrode (ISE) on HORIBA's patented flat sensor, so plant sap, a soil extract, or a drop of irrigation water can be measured on the spot instead of being bagged and sent to a lab.\u003c\/p\u003e\n\n\u003cp\u003eFor agronomy this changes the workflow entirely: nitrate or potassium results arrive in seconds while you are still standing in the field, so fertigation can be corrected the same day rather than the following week. All models are waterproof (IP67), calibrate at two points with the supplied standard solutions, run around 400 hours on two CR2032 batteries, weigh roughly 50 g, and take a user-replaceable sensor.\u003c\/p\u003e\n\n\u003ch3\u003eChoose your model\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLAQUAtwin NO3-11\u003c\/strong\u003e (part no. 3200689162) — nitrate, 4 to 9900 ppm. General-purpose water and solution testing. Includes plastic case, syringe and 150 and 2000 ppm standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLAQUAtwin NO3-11C\u003c\/strong\u003e (part no. 3200689163) — nitrate crop kit, 6 to 9900 ppm. Adds a carrying case, sap press and sampling equipment with 300 and 5000 ppm standards, for plant sap and petiole testing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLAQUAtwin NO3-11S\u003c\/strong\u003e (part no. 3200689164) — nitrate soil kit, 6 to 9900 ppm. Carrying case, press and sampling equipment with 30 and 300 ppm standards, matched to the lower concentrations found in soil extracts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLAQUAtwin K-11\u003c\/strong\u003e (part no. 3200689160) — potassium, 4 to 9900 ppm. Includes plastic case, syringe and 150 and 2000 ppm standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLAQUAtwin Na-11\u003c\/strong\u003e (part no. 3200689159) — sodium, 2 to 9900 ppm. Includes plastic case, syringe and 150 and 2000 ppm standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLAQUAtwin Ca-11\u003c\/strong\u003e (part no. 3200689161) — calcium, 4 to 9900 ppm. Includes plastic case, syringe and 150 and 2000 ppm standards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLAQUAtwin F-11\u003c\/strong\u003e (part no. 3200858466) — fluoride, 0.1 to 990 ppm. Includes plastic case, syringe and 1 and 10 ppm standards.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich nitrate model?\u003c\/h3\u003e\n\u003cp\u003eAll three nitrate meters use the same sensor; the difference is the kit and the calibration standards. Choose the plain \u003cstrong\u003eNO3-11\u003c\/strong\u003e for water and nutrient solutions. Choose \u003cstrong\u003eNO3-11C\u003c\/strong\u003e if you are pressing sap from petioles and stems, where concentrations run high. Choose \u003cstrong\u003eNO3-11S\u003c\/strong\u003e for soil extracts, which are far more dilute and need the lower 30 and 300 ppm standards to calibrate accurately.\u003c\/p\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eIn-field nitrate and potassium testing of plant sap and petiole samples\u003c\/li\u003e\n\u003cli\u003eSoil nitrate and calcium testing from extracts, at the sample point\u003c\/li\u003e\n\u003cli\u003eHydroponic and fertigation nutrient solution management\u003c\/li\u003e\n\u003cli\u003eIrrigation and well water quality assessment\u003c\/li\u003e\n\u003cli\u003eNitrate monitoring in surface water, groundwater and agricultural runoff\u003c\/li\u003e\n\u003cli\u003eDrinking water fluoride level verification\u003c\/li\u003e\n\u003cli\u003eSodium monitoring in boiler feedwater and process water\u003c\/li\u003e\n\u003cli\u003eFood and beverage QC on small samples\u003c\/li\u003e\n\u003cli\u003eAgronomy research, extension work and teaching laboratories\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\u003cli\u003e\u003ca href=\"https:\/\/static.horiba.com\/fileadmin\/Horiba\/Water_Quality\/04_Support\/Instruction_Manuals\/Pocket_Meters\/A-IM_-_LAQUAtwin_ISE_ALL.pdf\"\u003eLAQUAtwin ISE instruction manual, Ca-11 \/ K-11 \/ Na-11 \/ NO3-11 (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/static.horiba.com\/fileadmin\/Horiba\/Water_Quality\/04_Support\/Instruction_Manuals\/Pocket_Meters\/LAQUAtwin_NO3-11_NO3-11S_NO3-11C_Nitrate_Ion_Pocket_Meter_Instruction_Manual.pdf\"\u003eLAQUAtwin nitrate meter instruction manual, NO3-11 \/ NO3-11C \/ NO3-11S (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/static.horiba.com\/fileadmin\/Horiba\/Water_Quality\/04_Support\/Instruction_Manuals\/Pocket_Meters\/LAQUAtwin_Ca-11_Calcium_Ion_Pocket_Meter_Instruction_Manual.pdf\"\u003eLAQUAtwin Ca-11 calcium meter 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\/Pocket_Meters\/LAQUAtwin_Na-11_Sodium_Ion_Pocket_Meter_Instruction_Manual.pdf\"\u003eLAQUAtwin Na-11 sodium meter instruction manual (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eParts \u0026amp; accessories\u003c\/h3\u003e\n\u003cp\u003eReplacement ISE sensors (S022 sodium, S030 potassium, S040 nitrate, S050 calcium, S060 fluoride), the matching standard solution sets, fluoride ion strength adjustor, sampling sheets and holders 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":"NO3-11 - Nitrate, 4 to 9900 ppm - 3200689162","offer_id":48226168078526,"sku":"3200689162","price":395.0,"currency_code":"USD","in_stock":true},{"title":"NO3-11C - Nitrate Crop Kit, 6 to 9900 ppm - 3200689163","offer_id":48226168111294,"sku":"3200689163","price":596.0,"currency_code":"USD","in_stock":true},{"title":"NO3-11S - Nitrate Soil Kit, 6 to 9900 ppm - 3200689164","offer_id":48226168144062,"sku":"3200689164","price":641.0,"currency_code":"USD","in_stock":true},{"title":"K-11 - Potassium, 4 to 9900 ppm - 3200689160","offer_id":48226168176830,"sku":"3200689160","price":395.0,"currency_code":"USD","in_stock":true},{"title":"Na-11 - Sodium, 2 to 9900 ppm - 3200689159","offer_id":48226168209598,"sku":"3200689159","price":395.0,"currency_code":"USD","in_stock":true},{"title":"Ca-11 - Calcium, 4 to 9900 ppm - 3200689161","offer_id":48226168242366,"sku":"3200689161","price":431.0,"currency_code":"USD","in_stock":true},{"title":"F-11 - Fluoride, 0.1 to 990 ppm - 3200858466","offer_id":48226168275134,"sku":"3200858466","price":410.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0592\/9926\/6750\/files\/csm_Product_image_NO3-11C_NO3-11S_NO3-11_48111e26de.png?v=1785337034","url":"https:\/\/envirotechonline.com\/products\/horiba-laquatwin-ion-selective-pocket-meter","provider":"EnviroTech Services","version":"1.0","type":"link"}