Skip to content

Hanna Instrument HI9813-6 Replacement Electrode Probe



SKU: TST-HI-1285-6

Replacement electrode probe for the HI9813-6 Portable Meter. Made with a polypropylene body and featuring a built-in temperature sensor, this multiparameter probe provides quick and accurate pH, EC, and TDS readings. The pH electrode circuit comes pre-amplified to reduce electrical noise which can affect a reading’s accuracy. Perfect for hydroponic and aquaponic systems, greenhouses, grow tents, and more.

NOTE: Comes with replacement probe ONLY HI9813-6 Portable Meter sold separately.

Only 4 left in stock

Your Garden's Success is our #1 Priority

HTG Supply is committed to providing you with the very best products, pricing and service in the industry. We will ship your order fast and discreetly packaged to protect your privacy. Buy with confidence knowing your HTG Supply purchase includes simple returns as well as lifetime product support. Call our team of real growing experts with your purchasing or product use questions, and we will be here to help!

See it for less somewhere else? Give us a call and we’ll beat any online competitor’s price!

Customer Service:  1-866-710-GROW (4769) | | Hours: Mon-Fri 9:00 a.m. to 5:00 p.m.


Hanna Instrument HI9813-6 Replacement Electrode Probe

Measure pH, conductivity (EC), and TDS (ppm) with the HI1285-6 multiparameter probe. Perfect for measurements in greenhouses, water treatment, boilers, and cooling towers with a polypropylene body, built-in temperature sensor, and pre-amplified pH electrode. The HI1285-6 is designed for use with the HI9813-6 Portable pH/EC/TDS/Temperature Meter with CAL Check™.


Pre-Amplified Multiparameter pH Probe: 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 HI1285-6 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 HI1285-6 multiparameter pH probe 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 minimize breakage due to accidental bumping or dropping of the electrode. Polypropylene plastic is a high-quality plastic that is chemically resistant to many aggressive chemicals.

DIN Connector with CAL Check: The HI1285-6 uses a DIN connector. This type of connector is generally proprietary to the meters they are supplied with and may not be interchangeable. The connection of the HI1285-6 enables the CAL Check function on the HI9813-6 portable multiparameter meter.

Weight 0.43 lbs
Dimensions 10 × 2.75 × 2 in


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.