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Hanna Instruments HI 98121 ph ph ORP Temperature Tester meter ph meter hydroponics
$275.00
{"id":4784487491,"title":"Hanna Instruments HI 98121 ph ph ORP Temperature Tester meter ph meter hydroponics","handle":"hanna-instruments-hi-98121-ph-ph-orp-temperature-tester-meter-ph-meter-hydroponics","description":"\u003ch2\u003e\u003cspan\u003eHI98121 ORP\/pH\/Temperature Tester\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eThe HI98121 is a waterproof pH, ORP and temperature meter. The housing of this tester has been completely sealed against humidity and is designed to float. Electrode replacement with the stainless steel round connector means there are no pins to bend or break during replacement. When the cloth junction becomes clogged and response time is sluggish, simply pull out 3 mm (1\/8”) to clear the clogging which will improve response time and stability. The exposed stainless steel temperature sensor on these models facilitates faster and more accurate temperature measurement.\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"150px\"\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1116\/7624\/files\/waterproof_large.png?6296192613228469200\" alt=\"\" width=\"120\" height=\"120\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\"\u003e \n\u003ch3\u003eWaterproof\u003c\/h3\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"150px\"\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1116\/7624\/files\/replaceable-electrode1_large.png?7433210959434717153\" width=\"120\" alt=\"\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\"\u003e\n\u003ch3\u003eReplaceable pH electrode with extractable junction\u003c\/h3\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"150px\"\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1116\/7624\/files\/check-mark_large.png?6938704958971639467\" width=\"120\" alt=\"\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\"\u003e\n\u003ch3\u003eAutomatic 1 or 2 point pH calibration\u003c\/h3\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"tab-content\"\u003e\n\u003ch2\u003eDetails\u003c\/h2\u003e\n\u003cdiv class=\"std\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe HI98121 is a lightweight ergonomically designed tester. This tester is designed to float making it ideal for taking readings virtually anywhere.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eBy definition pH is the measurement of the voltage generated by an electrochemical cell at zero current. The potential generated is proportional to the thermodynamic activity of the ion being measured.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003epH can further be described as the negative log of the concentration of hydrogen ions, pH=-log\u003c\/span\u003e\u003cspan\u003e10\u003c\/span\u003e\u003cspan\u003e[H\u003c\/span\u003e\u003cspan\u003e+\u003c\/span\u003e\u003cspan\u003e]. This is based on the fact that pure water, H\u003c\/span\u003e\u003cspan\u003e2\u003c\/span\u003e\u003cspan\u003eO, has an equal amount of hydrogen (H\u003c\/span\u003e\u003cspan\u003e+\u003c\/span\u003e\u003cspan\u003e) ions and hydroxide (OH\u003c\/span\u003e\u003cspan\u003e-\u003c\/span\u003e\u003cspan\u003e) ions. In pure water there is an equal amount of positive ions and negative ions, making the solution neutral. As a pH changes, there is a 10 times change in H\u003c\/span\u003e\u003cspan\u003e+\u003c\/span\u003e\u003cspan\u003e concentration per pH unit.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/lh6.googleusercontent.com\/qBpEaOAEh45C5dGIoJKnIOqVQtfqAcyuNgcR8r41gA2WW_yh8BXNKrF0mbhVOL4wahD0Fc672bMZAtLPdxMzaiDkSbYf2kZQe77BYpWkZadoVA6mwZyjcdjrGfyMZZE3dFyByvk\" alt=\"\" width=\"512px;\" height=\"307px;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eSimilar to the manner in which acidic or alkaline solutions are quantied by pH measurements, solutions can also be graded as oxidizing or reducing based on measurements of ORP (sometimes called \"redox\").\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen an oxidizing and\/or reducing agent is dissolved into an aqueous solution, they may react with materials present and produce a voltage, or electromotive force (EMF), that is related to the ratio of oxidized to reduce species in the sample. An electron exchange can develop between this solution and an inert metal sensor immersed in the solution, and the voltage can be measured (when compared to a reference electrode) with a pH\/mV meter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThis type of measurement is known as redox or ORP. The units of measurement are in mV. At a glance, an ORP electrode may look very similar to a pH electrode. Like a combination pH electrode, both the sensor and the reference are housed in a common body.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe scale of measurement may be positive (indicating oxidizing potential) or negative (indicating reducing). It should be noted that when zero mV is observed, it is really an oxidizing situation because the reference voltage (~200 mV for an Ag\/AgCl with KCl electrolyte) is included in the observed mV value. In some cases the user may wish to offset the reading to remove the reference contribution. The mV is then said to be approaching the absolute mV scale that references a SHE (standard hydrogen electrode).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThis type of calibration is called relative mV calibration. An ORP sensor must be chemically inert; it cannot be oxidized or reduced itself. It must also have the proper surface characteristics to promote rapid electron exchange, a property known as high exchange current density. Two noble metals have proven to work well for this purpose: pure platinum and pure gold are both used in the construction of ORP sensors.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe platinum sensor is often preferred because it is mechanically simpler and safer to produce. Platinum can be welded to glass and has the same thermal coefficient. Sensors made of gold cannot be welded to the glass and are often placed in plastic supports applied to the glass or plastic tube by means of tiny elastomeric bungs. The gold or platinum sensor signal is carried through the electrode body, and together with the reference signal is conducted to the measurement meter via a coaxial cable with BNC connector.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eFeatures at-a-glance:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWaterproof\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAutomatic temperature compensation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eHOLD feature\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eSimple to use\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eEconomical\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tab-content\"\u003e\n\u003cdiv id=\"spec\" class=\"box-collateral box-additional\"\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable class=\"data-table\" id=\"product-attribute-specs-table-1\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"25%\"\u003e \u003ccol\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr class=\"first odd\"\u003e\n\u003cth class=\"label\"\u003epH Range\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e-2.00 to 16.00 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003epH Resolution\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e0.01 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003epH Accuracy\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e±0.05 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eORP Range\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e±1000 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eORP Resolution\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e1 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\" style=\"text-align: left;\"\u003eORP Accuracy\u003c\/th\u003e\n\u003ctd class=\"data last\" style=\"text-align: left;\"\u003e±2 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eTemperature Range\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e-5.0 to 60.0°C \/ 23.0 to 140.0°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eTemperature Resolution\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e0.1°C \/ 0.1°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eTemperature Accuracy\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e±0.5°C \/±1°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003epH Calibration\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eautomatic, at one or two points with two sets of standard buffers (pH 4.01 \/ 7.01 \/ 10.01 or pH 4.01 \/ 6.86 \/ 9.18)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eTemperature Compensation\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eautomatic for pH readings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eBattery Type\/Life\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e1.5V (4) \/ approximately 250 hours of continuous use; auto-off after 8 minutes of non-use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eElectrode\/Probe\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eHI73127 replaceable pH electrode (included); fixed ORP sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eEnvironment\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e-5 to 50°C (23 to 122°F); RH max 100%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e163 x 40 x 26 mm (6.4 x 1.6 x 1.0’’)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e100 g (3.5 oz.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\" style=\"text-align: left;\"\u003eOrdering Information\u003c\/th\u003e\n\u003ctd class=\"data last\" style=\"text-align: left;\"\u003eHI98121 (ORP\/pH) is supplied with HI73127 pH electrode, HI73128 electrode removal tool, batteries and instructions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 style=\"float: left;\"\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/h3\u003e","published_at":"2016-01-17T11:22:00-06:00","created_at":"2016-01-17T11:38:26-06:00","vendor":"Hanna","type":"Accessories","tags":["Brand_Hanna"],"price":27500,"price_min":27500,"price_max":27500,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":14758605827,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Hanna Instruments HI 98121 ph ph ORP Temperature Tester meter ph meter hydroponics","public_title":null,"options":["Default Title"],"price":27500,"weight":0,"compare_at_price":null,"inventory_quantity":1,"inventory_management":null,"inventory_policy":"deny","barcode":"","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/instrumentsmall.com\/cdn\/shop\/products\/hi98121_1.jpg?v=1453052316"],"featured_image":"\/\/instrumentsmall.com\/cdn\/shop\/products\/hi98121_1.jpg?v=1453052316","options":["Title"],"media":[{"alt":null,"id":74761338946,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/instrumentsmall.com\/cdn\/shop\/products\/hi98121_1.jpg?v=1453052316"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/instrumentsmall.com\/cdn\/shop\/products\/hi98121_1.jpg?v=1453052316","width":1200}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch2\u003e\u003cspan\u003eHI98121 ORP\/pH\/Temperature Tester\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eThe HI98121 is a waterproof pH, ORP and temperature meter. The housing of this tester has been completely sealed against humidity and is designed to float. Electrode replacement with the stainless steel round connector means there are no pins to bend or break during replacement. When the cloth junction becomes clogged and response time is sluggish, simply pull out 3 mm (1\/8”) to clear the clogging which will improve response time and stability. The exposed stainless steel temperature sensor on these models facilitates faster and more accurate temperature measurement.\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"150px\"\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1116\/7624\/files\/waterproof_large.png?6296192613228469200\" alt=\"\" width=\"120\" height=\"120\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\"\u003e \n\u003ch3\u003eWaterproof\u003c\/h3\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"150px\"\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1116\/7624\/files\/replaceable-electrode1_large.png?7433210959434717153\" width=\"120\" alt=\"\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\"\u003e\n\u003ch3\u003eReplaceable pH electrode with extractable junction\u003c\/h3\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"150px\"\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1116\/7624\/files\/check-mark_large.png?6938704958971639467\" width=\"120\" alt=\"\"\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\"\u003e\n\u003ch3\u003eAutomatic 1 or 2 point pH calibration\u003c\/h3\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cdiv class=\"tab-content\"\u003e\n\u003ch2\u003eDetails\u003c\/h2\u003e\n\u003cdiv class=\"std\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe HI98121 is a lightweight ergonomically designed tester. This tester is designed to float making it ideal for taking readings virtually anywhere.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eBy definition pH is the measurement of the voltage generated by an electrochemical cell at zero current. The potential generated is proportional to the thermodynamic activity of the ion being measured.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003epH can further be described as the negative log of the concentration of hydrogen ions, pH=-log\u003c\/span\u003e\u003cspan\u003e10\u003c\/span\u003e\u003cspan\u003e[H\u003c\/span\u003e\u003cspan\u003e+\u003c\/span\u003e\u003cspan\u003e]. This is based on the fact that pure water, H\u003c\/span\u003e\u003cspan\u003e2\u003c\/span\u003e\u003cspan\u003eO, has an equal amount of hydrogen (H\u003c\/span\u003e\u003cspan\u003e+\u003c\/span\u003e\u003cspan\u003e) ions and hydroxide (OH\u003c\/span\u003e\u003cspan\u003e-\u003c\/span\u003e\u003cspan\u003e) ions. In pure water there is an equal amount of positive ions and negative ions, making the solution neutral. As a pH changes, there is a 10 times change in H\u003c\/span\u003e\u003cspan\u003e+\u003c\/span\u003e\u003cspan\u003e concentration per pH unit.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/lh6.googleusercontent.com\/qBpEaOAEh45C5dGIoJKnIOqVQtfqAcyuNgcR8r41gA2WW_yh8BXNKrF0mbhVOL4wahD0Fc672bMZAtLPdxMzaiDkSbYf2kZQe77BYpWkZadoVA6mwZyjcdjrGfyMZZE3dFyByvk\" alt=\"\" width=\"512px;\" height=\"307px;\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eSimilar to the manner in which acidic or alkaline solutions are quantied by pH measurements, solutions can also be graded as oxidizing or reducing based on measurements of ORP (sometimes called \"redox\").\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWhen an oxidizing and\/or reducing agent is dissolved into an aqueous solution, they may react with materials present and produce a voltage, or electromotive force (EMF), that is related to the ratio of oxidized to reduce species in the sample. An electron exchange can develop between this solution and an inert metal sensor immersed in the solution, and the voltage can be measured (when compared to a reference electrode) with a pH\/mV meter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThis type of measurement is known as redox or ORP. The units of measurement are in mV. At a glance, an ORP electrode may look very similar to a pH electrode. Like a combination pH electrode, both the sensor and the reference are housed in a common body.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe scale of measurement may be positive (indicating oxidizing potential) or negative (indicating reducing). It should be noted that when zero mV is observed, it is really an oxidizing situation because the reference voltage (~200 mV for an Ag\/AgCl with KCl electrolyte) is included in the observed mV value. In some cases the user may wish to offset the reading to remove the reference contribution. The mV is then said to be approaching the absolute mV scale that references a SHE (standard hydrogen electrode).\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThis type of calibration is called relative mV calibration. An ORP sensor must be chemically inert; it cannot be oxidized or reduced itself. It must also have the proper surface characteristics to promote rapid electron exchange, a property known as high exchange current density. Two noble metals have proven to work well for this purpose: pure platinum and pure gold are both used in the construction of ORP sensors.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eThe platinum sensor is often preferred because it is mechanically simpler and safer to produce. Platinum can be welded to glass and has the same thermal coefficient. Sensors made of gold cannot be welded to the glass and are often placed in plastic supports applied to the glass or plastic tube by means of tiny elastomeric bungs. The gold or platinum sensor signal is carried through the electrode body, and together with the reference signal is conducted to the measurement meter via a coaxial cable with BNC connector.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cspan\u003eFeatures at-a-glance:\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eWaterproof\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eAutomatic temperature compensation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eHOLD feature\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eSimple to use\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\n\u003cp dir=\"ltr\"\u003e\u003cspan\u003eEconomical\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"tab-content\"\u003e\n\u003cdiv id=\"spec\" class=\"box-collateral box-additional\"\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable class=\"data-table\" id=\"product-attribute-specs-table-1\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"25%\"\u003e \u003ccol\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr class=\"first odd\"\u003e\n\u003cth class=\"label\"\u003epH Range\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e-2.00 to 16.00 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003epH Resolution\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e0.01 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003epH Accuracy\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e±0.05 pH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\"\u003eORP Range\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e±1000 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\"\u003e\n\u003cth class=\"label\"\u003eORP Resolution\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e1 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\"\u003e\n\u003cth class=\"label\" style=\"text-align: left;\"\u003eORP Accuracy\u003c\/th\u003e\n\u003ctd class=\"data last\" style=\"text-align: left;\"\u003e±2 mV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eTemperature Range\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e-5.0 to 60.0°C \/ 23.0 to 140.0°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eTemperature Resolution\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e0.1°C \/ 0.1°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eTemperature Accuracy\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e±0.5°C \/±1°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003epH Calibration\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eautomatic, at one or two points with two sets of standard buffers (pH 4.01 \/ 7.01 \/ 10.01 or pH 4.01 \/ 6.86 \/ 9.18)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eTemperature Compensation\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eautomatic for pH readings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eBattery Type\/Life\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e1.5V (4) \/ approximately 250 hours of continuous use; auto-off after 8 minutes of non-use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eElectrode\/Probe\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003eHI73127 replaceable pH electrode (included); fixed ORP sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eEnvironment\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e-5 to 50°C (23 to 122°F); RH max 100%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"odd\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eDimensions\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e163 x 40 x 26 mm (6.4 x 1.6 x 1.0’’)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"even\" style=\"text-align: left;\"\u003e\n\u003cth class=\"label\"\u003eWeight\u003c\/th\u003e\n\u003ctd class=\"data last\"\u003e100 g (3.5 oz.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"last odd\"\u003e\n\u003cth class=\"label\" style=\"text-align: left;\"\u003eOrdering Information\u003c\/th\u003e\n\u003ctd class=\"data last\" style=\"text-align: left;\"\u003eHI98121 (ORP\/pH) is supplied with HI73127 pH electrode, HI73128 electrode removal tool, batteries and instructions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 style=\"float: left;\"\u003e\n\u003cbr\u003e\u003cbr\u003e\n\u003c\/h3\u003e"}