Hanna HI1294D Offers The design consideration for the HI1294D is ideal for pH measurements in soils and hydroponics growing media including rockwool, coconut cour, perlite and other soiless substrates. The HI1294D can only be used with Hanna's HI9814 Groline portable pH/EC/TDS meter. (Meter Not Included) This electrode has a triple ceramic junction in the outer reference cell and the conic pH sensing tip is made with low temperature glass. There is an integrated amplifier and built-in temperature sensor for automatically temperature compensated pH readings. Low Temperature Glass Formulation The glass tip uses a 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. Conic Bulb The conical shaped tip design allows for penetration into solids, semi solids and emulsions. Designed for the direct measurement of pH in soils and soil slurries. Glass Body The glass of the HI1294D 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. Triple Ceramic Junction The triple junction allows for a higher flow rate of electrolyte from the reference cell into the measurement sample. Refillable The HI1294D is a refillable probe. 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. DIN Connector The HI1294D has a DIN connector that can only be used with the HI9814 Groline portable pH/t/EC/TDS meter. Free Shipping rates apply to the lower 48 contiguous states. Contact Us to get shipping cost to your area if not in the lower 48 states before purchase. We ship all items discreetly Whether you are a novice gardener or a mad scientist in the greenhouse, you will find a plethora of inventory and knowledge at the Spokane Organic Hydroponic Supply centers. Our first store opened its doors in 2006 when Paul and mother Susan, both avid and life-long gardeners, joined together to share their passion and gardening experiences with the Spokane community. In 2010, Susan moved on to pursue other endeavors while Paul continued to expand the business. Each of our two stores employ experienced staff members with traditional garden expertise and modern industry knowledge. With real-life experiences, our plant experts know the challenges of outdoor and year-round gardening and strive to help customers eliminate avoidable mistakes. Our alternative and earth friendly stores we have created will leave you with a sense of empowerment to develop your own efficient methods of growing and caring for plants. We look forward to your visit and hearing the plant stories you have to share with us! We ship daily Monday - Friday. All orders will be shipped within 3 to 5 working days. Most will go within 24 hours. You will automatically receive a tracking # via email once we have shipped your order. All domestic orders will be shipped by UPS, Fedex ground, USPS priority mail or USPS ground. If you need to use a special carrier i.e. PO BOX w/ USPS, please email us and let us know. We will only ship to the address provided during payment. We are not responsible for any packages that are lost or damaged if insurance is not purchased. Shipping and handling rate is fixed and non-refundable. Free Shipping rates apply to 48 contiguous United States. Contact us for shipping cost to your area. No returns No returns are accepted on any nutrients and fertilizers Be sure the item is what you want because of the no return policy Pictures may be different then product sold We ship all items discreetly Satisfaction : Discreetly labeled, Professionally packaged, shipped as fast as possible with care read the feedback for proof. Our prices are competitive but the service is Priceless! We know how to ship liquids with no leaks and 100% satisfaction guaranteed. Your satisfaction is very important to us! If you have any problem with your order, please do not leave negative comments. Please Contact us ... we will help you out! In the unlikely event that the item is sold out from our stock or on back order, we will contact you to see if you want to wait a few days or we will refund 100% of your money. YOUR choice. Occasionally items sell from our brick and mortar store front before we are able to pull down our listing or adjust quantities. We try our best to fulfill these orders in a timely manner if possible. These cases are very rare, we will let you know as soon as possible and refund your money.