The HI1285-7 is a 3-in-1 pre-amplified multiparameter probe that measures pH, EC/TDS, and temperature within a single polypropylene body. The pH portion of this probe is constructed with a cloth junction, maintenance-free polymer gel electrolyte, and a low-temperature glass sensing bulb. The EC/TDS portion of this probe utilizes two stainless steel pins for an amperometric determination of conductivity and total dissolved solids. A built-in temperature sensor ensures that both pH and EC/TDS readings are compensated for temperature variations in both standards and samples. The design consideration for the HI1285-7 is ideal for measuring the pH, EC/TDS, and temperature in greenhouses, hydroponics, and other agricultural applications. The HI1285-7 is designed for use with Hanna's HI9814 portable multiparameter meter.

Pre-Amplified pH Electrode

The pH electrode circuit has a built-in amplifier that serves to reduce the effects of electrical noise on the high impedance-pH measurement. Electrical noise can come from motors and pumps that are common in greenhouses. The single reference junction design of the pH electrode has a cloth junction that allows ion movement between the inner gel electrolyte and the sample being measured. The advantage of the cloth junction is that it can be extracted from the probe, exposing a fresh surface when readings become drifty or erratic. These features make this probe ideal for use in fertilizer solutions.

Amperometric EC/TDS Sensor

EC/TDS readings are performed by a two-pin amperometric sensor. An alternating voltage is applied to the sensor and the amount of current that passes between the two stainless steel pins determines the amount of dissolved ionic solids present.

Built-In Temperature Sensor

pH and EC/TDS readings must be temperature compensated in order to obtain accurate results. The built-in temperature sensor of the HI1285-7 provides a speedy temperature reading which is then used to adjust the pH and EC/TDS results accordingly.

Polypropylene Body

The polypropylene body of the HI1285-7 houses all three sensors within a sturdy, single body design. This body material is suitable for a wide range of applications and excels in measurements with portable meters due to its durability. The fins around the spherical glass pH bulb minimizes breakage due to accidental bumping or dropping of the electrode. The polypropylene plastic is a high-quality plastic that is chemically resistant to many aggressive chemicals.

Quick Connect DIN Connector

The HI1285-7 uses a Quick Connect DIN connector that makes attaching and removing the probe simple and easy. This type of connector is generally proprietary to the meters they are supplied with. The HI1285-7 is designed for use with Hanna’s HI9814 GroLine hydroponic waterproof pH/EC/TDS/Temperature portable meter.

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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.
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Free Shipping rates apply to 48 contiguous United States.
Contact us for shipping cost to your area.
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No returns are accepted on any nutrients and fertilizers
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We ship all items discreetly

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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.