{"product_id":"ph-electrode-for-direct-soil-measurement-hi12923","title":"pH Electrode for Direct Soil Measurement - HI12923","description":"\u003cp\u003eHanna Instruments offers a wide variety of pH electrodes that are designed for many different applications. The type of glass used for sensing pH,  bulb shape,  body material,  type of junction,  type of reference and electrolyte used are just some of the design considerations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe HI12923 uses low temperature (LT) glass,  conic bulb,  glass body,  triple ceramic junction,  and is refillable with 3.5M KCl + AgCl.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch5\u003eLow Temperature Glass Formulation\u003c\/h5\u003e\n\u003cp\u003eThe glass tip uses a special LT glass formulation with a lower resistance of approximately 50 megaohms compared to general purpose (GP) with a resistance of about 100 megaohms. As the temperature of the glass decreases when in a sample at low temperature,  the resistance of the LT glass will increase approaching that of GP glass at ambient temperatures. If using GP glass,  the resistance would increase above the optimum resistance for the high impedance input of a pH meter.The HI1292D is suitable to use with samples that measure from -5 to 70℃.\u003c\/p\u003e\n\u003ch5\u003eConic Bulb\u003c\/h5\u003e\n\u003cp\u003eThe conical shaped tip design allows for penetration into solids,  semi solids,  and emulsions. The HI12923 is ideal for the direct measurement of pH in soils and soil slurries.\u003c\/p\u003e\n\u003ch5\u003eGlass Body\u003c\/h5\u003e\n\u003cp\u003eThe glass of the HI12923 is resistant to many harsh chemicals and is easily cleaned. The glass body also allow for a fast transfer of heat to the internal reference electrolyte. The mV generated by the reference cell is temperature dependent. The faster the equilibrium the steadier the reference potential.\u003c\/p\u003e\n\u003ch5\u003eTriple Ceramic Junction\u003c\/h5\u003e\n\u003cp\u003eThe triple ceramic junction allows a higher flow rate of electrolyte from the reference cell into the measurement sample. A typical pH electrode will have a single ceramic junction that flow rate of 15 to 20 µL\/hour. The HI12923 has three ceramic junctions in contact with the sample providing for a flow rate of 40 to 50 µL\/hour. The increased flow provides a greater continuity between the reference electrode and the indicating electrode.\u003c\/p\u003e\n\u003ch5\u003eRefillable\u003c\/h5\u003e\n\u003cp\u003eThe HI12923 is a refillable probe. Since it is a single junction pH electrode the fill solution is the HI7071 3.5M KCl + AgCl. If using a refillable pH electrode,  the fill cap should be removed prior to calibration and measurement. Removing the cap creates positive head pressure in the reference cell allowing for higher flow rate of electrolyte through the outer junction. A higher flow rate will result in a faster and more stable reading.\u003c\/p\u003e\n\u003ch5\u003eDIN Connector\u003c\/h5\u003e\n\u003cp\u003eThe HI12923 has a quick connect DIN connector that can be used with the HI99121 portable pH\/temperature meter for direct pH measurement in soil.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e HI12923\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eName\u003c\/td\u003e\n\u003ctd\u003e pH Electrode for Direct Soil Measurement - HI12923\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement Range\u003c\/td\u003e\n\u003ctd\u003e pH: 0 to 12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReference Cell Type\u003c\/td\u003e\n\u003ctd\u003e single, Ag\/AgCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJunction Type\/Flow Rate\u003c\/td\u003e\n\u003ctd\u003e ceramic, triple \/ 40-50 µL\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefill Electrolyte\u003c\/td\u003e\n\u003ctd\u003e 3.5M KCl + AgCl\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Material\u003c\/td\u003e\n\u003ctd\u003e glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTip \/ Shape\u003c\/td\u003e\n\u003ctd\u003e conic (12 x 12 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMatching Pin\u003c\/td\u003e\n\u003ctd\u003e no\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. Pressure\u003c\/td\u003e\n\u003ctd\u003e 0.1 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Operating Range\u003c\/td\u003e\n\u003ctd\u003e -5 to 70°C (23 to 158°F) - LT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Length\/Overall Length\u003c\/td\u003e\n\u003ctd\u003e 120 mm \/ 175.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Sensor\u003c\/td\u003e\n\u003ctd\u003e yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e 12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable\u003c\/td\u003e\n\u003ctd\u003e 7-pole; 1 m (3.3 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003e quick connect DIN connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplifier\u003c\/td\u003e\n\u003ctd\u003e yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Use\u003c\/td\u003e\n\u003ctd\u003e direct soil pH measurement, soil samples, soil solution\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eManuals\u003c\/h3\u003e\u003cp\u003e\u003ca target=\"_blank\" href=\"https:\/\/manuals.hannainst.com\/HI12923\"\u003epH Electrode for Direct Soil Measurement - HI12923\u003c\/a\u003e\u003c\/p\u003e","brand":"Hanna Instruments","offers":[{"title":"Default Title","offer_id":67871211127153,"sku":"HI12923","price":21326.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/9535\/5761\/files\/hi1292d_1_2.jpg?v=1792645886","url":"https:\/\/hannainst.in\/products\/ph-electrode-for-direct-soil-measurement-hi12923","provider":"hanna","version":"1.0","type":"link"}