Laboratory supply

Patel Chemhub Private Limited
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Replacement pH, ORP and Dissolved Oxygen Electrodes

Range of replacement combination pH, ORP and dissolved oxygen electrodes on BNC connectors, selected by sample type rather than by meter, for any instrument with a BNC input.

Typical applications

  • Routine laboratory pH measurement
  • Waste and effluent sampling
  • Food, dairy and surface pH measurement
  • Strong acid, alkaline and organic solutions
  • High-purity and low ionic strength water
  • ORP and dissolved oxygen measurement

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Add as many products as you need and send one enquiry covering all of them, or send this item on its own. Bulk and drum quantities are quoted on request.

Worth knowing before you order

These are consumable replacement sensors, not instruments, and a pH meter is only as good as the electrode plugged into it, so choose by sample type. A general-purpose plastic electrode will read quickly and die early in strong acid or alkali; low ionic strength water needs the ceramic-junction glass type, and a flat-surface electrode is the only sensible choice on cheese, meat or paper. Two types are refillable and need KCl filling solution as a running cost, and every one of them needs storage solution — never plain water. Read the per-model figures rather than the summary line: the page prints a common specification of 0–14 pH and 5–60 °C, but ER4 and ER6 are 2–12 pH, and ER5, ER6 and ER8 run to 90 °C. The temperature range for ER10 is printed as '05 -70°C' and is ambiguous, so it has been left out and should be confirmed.

Specification

Item typeReplacement / consumable electrodes, sold as sensors not as instruments
ConstructionCombination glass and reference electrode; inner reference Ag/AgCl
Connector and cableBNC, 90 cm cable
Electrode dimensionsØ 12 x 160 mm
ER1, pHPlastic body, general laboratory use; 0–14 pH, 5–60 °C
ER2, pHPlastic body, waste solutions; not for strong acid or alkaline samples; 0–14 pH, 5–60 °C
ER3, pHPlastic body, high and low ionic concentration samples such as rain, sea and drinking water; 0–14 pH, 5–60 °C
ER4, pHPlastic body, flat surface for food, cheese, paper, skin, meat and butter; 2–12 pH, 5–60 °C
ER5, pHGlass body, ceramic liquid junction, for strong acid, alkaline and organic solutions; 0–14 pH, 5–90 °C
ER6, pHGlass body, ceramic junction, for low ionic strength samples such as high-purity water; 2–12 pH, 5–90 °C
ER10, pHGlass body, refillable (KCl filled), ceramic junction, general laboratory use; 0–14 pH
ER7, ORPPlastic body, general redox measurement; ± 1000 mV, 5–60 °C
ER8, ORPGlass body, high-temperature redox measurement; ± 1000 mV, 5–90 °C
ER9, dissolved oxygenElectrochemical sensor; 0–20 ppm, 0–50 °C

Support available

  • Calibration
  • Spares & consumables

Calibration is arranged through NABL-accredited laboratories under the relevant scope. We state the scope and the certificate number on the quotation — see what accreditation actually covers.

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