Hanna Instruments

Scientific Equipment

HI-1285-5 Spare Electrodes

HI-1285-5 Spare Electrodes

HI-1285-5 Spare Electrodes

HI-1285-5 Spare Electrodes

Gel-filled
1m cable
£123.00 (exc. VAT) £147.60 (inc. VAT)

The HI-1285-5 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 utilises 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 HI-1285-5 is ideal for measuring the pH, EC/TDS, and temperature in greenhouses, hydroponics, environmental monitoring, water treatment, and boilers and cooling towers. The HI-1285-5 is designed for use with Hanna’s HI-9813-5, HI-9812-5, and HI-9811-5 portable multiparameter meters.

HI-1285-5 Spare Electrodes information

Hanna's extended description

Pre-amplified pH and EC Probe



The HI-1285-5 is a pre-amplified pH and EC probe for use with the HI-9813-5.


Ideal for
  • Greenhouses
  • Hydroponics
  • Environmental monitoring
  • Water treatment
  • Boilers and cooling towers


  • Hanna Instruments offers a wide variety of electrodes that are designed for many different applications. The sensing material, body material, and connection type used are just some of the design considerations.


    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 fertiliser 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 HI-1285-5 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 HI-1285-5 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 minimises 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.


    DIN Connector

    The HI-1285-5 uses a DIN connector. This type of connector is generally proprietary to the meters they are supplied with and may not be interchangeable. The HI-1285-5 is designed for use with Hanna’s HI-9813-5, HI-9812-5, and HI-9811-5 portable multiparameter meters.



    DIN Connector

    Specifications

    Specifications list

    Specifications

    Reference Single, Ag/AgCl
    Junction Cloth
    Connector Multi-pin
    Electrolyte Gel
    Max Pressure 0.1 bar
    Range 0 to 13 pH; EC; 0 to 60°C (32 to 140°F)
    Tip Shape Spheric (dia: 8 mm)
    Temperature Sensor Yes
    Amplifier Yes
    Body Material Polypropylene
    Cable 7-pole; 2 m (6.6')
    Recommended Use Greenhouses, hydroponics, environmental monitoring,
    water treatment, boilers, cooling towers

    Product Literature

    literature - PDF

    Hanna Instruments Literature

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