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Industrial & Scientific > Lab & Scientific Products > Lab Instruments & Equipment > Electrochemistry Accessories > B0085X81YQ
  1. Hanna-Instruments HI3131B Refillable Combination ORP Electrode, BNC Connection, 1m Cable
    Hanna-Instruments HI3131B Refillable Combination ORP Electrode, BNC Connection, 1m Cable
    Hanna-Instruments HI3131B Refillable Combination ORP Electrode, BNC Connection, 1m Cable
    Image(s) provided for illustrative purposes and may differ from the actual product
  2. Hanna-Instruments HI3131B Refillable Combination ORP Electrode, BNC Connection, 1m Cable

    Delivery: 10-20 Working Days
    Sold Out / Out of Stock

Product Description

  • Combination (full-cell) oxygen reduction potential (ORP)/mV electrode for titration and laboratory applications
  • Ceramic junction for long electrode life in harsh environments
  • Glass body with conical tip and platinum pin for use in highly corrosive environments and high temperatures
  • Refillable to prolong electrode life
  • Comes with 1m (3.3') coaxial cable and has Bayonet Neill-Concelman (BNC) connector for tight coaxial cable connections
Additional Information

The Hanna Instruments HI 3131B is a combination (full-cell) oxygen reduction potential (ORP)/mV electrode with a ceramic junction, glass body, conical tip, platinum pin, a 1m (3.3') cable, a Bayonet Neill-Concelman (BNC) connector, and is refillable. An ORP electrode is used to measure the oxidization or reduction capacity of a solution, and to monitor chemical reactions and ion activity. It is commonly used for water testing, pulp bleaching, and for biological sample analysis in swimming pools, cooling towers, wastewater treatment, and industrial applications. The 150mm glass body with 12mm outside diameter of this electrode is for use in highly corrosive environments and high temperatures. The ceramic junction has a flow rate of 15 to 20 microliters per hour and provides long electrode life in harsh environments. The electrode has a platinum pin to measure conductivity. The electrode is refillable to prolong electrode life. A BNC connector provides tight cable connections. The electrode comes with 1m (3.3') coaxial cable


ORP range+ or – 2000mV
JunctionTriple ceramic
ElectrolyteKCl 3.5M plus AgCl
ReferenceSingle, Ag/AgCl
Body materialGlass
Operating temperature20 to 40 degrees C (68 to 104 degrees F)
Maximum pressure0.1 bar
Cable1m (3.3') coaxial

An electrode, also called a sensor or probe, is an instrument used with a meter to test and measure parameters of a substance. All electrodes are probes or sensors, but not all probes are electrodes or sensors. Probes, such as temperature probes, are used to penetrate a material for measurement. Common electrode types are pH, total dissolved solid (TDS), and ion selective electrode (ISE). Electrodes can be half-cell or full-cell (also called combination) types. They can be refillable or non-refillable. Housing material is typically glass or epoxy, and sensors are commonly made with stainless steel or a glass bulb. pH electrodes, which measure the pH of a substance, often have a glass bulb. The bulb senses hydrogen ions, and generates a millivoltage that is picked up by the filling solution and transferred to a wire that connects to the pH meter. Ion selective electrodes (ISEs) respond selectively to ions in the presence of other ions. Electrodes are commonly used by researchers, manufacturers, and hobbyists in a wide variety of industries, such as aquaculture, agriculture, chemistry, food and beverage, wine-making and water-testing, and for scientific applications. An electrode can be used with a datalogger to assist in temperature measurement.

Hanna Instruments manufactures analytical instrumentation and supplies, including pH meters, electrodes, chemical reagents, and buffer solutions. The company, founded in 1978 and headquartered in Woonsocket, RI, meets International Organization for Standardization (ISO) standard 9001.

What’s in the Box?
  • HI 3131B electrode
  • 1m (3.3') cable

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Please Note

The authorised South African distributor of this product is under no obligation to honour the manufacture's guarantees/warranties or to provide after-sales service.

Please note that this item is imported from the USA, and is designed to be used in the USA. In addition, if the unit is powered it will come with a US plug and an adapter/transformer may be required. Please click here for more information on power requirements, or check with us if you are unsure or need any assistance!

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