COLO.SCIENCE – WATER QUALITY ACCESSORIES
Water Quality Accessories ensure accurate and stable measurements for all pH, conductivity, DO and turbidity instruments. These items support routine testing, calibration and long-term reliability in laboratories and field applications.
This category brings together electrodes, sensors, standards and flow cells in one place. As a result, you can quickly select the correct accessory and keep your water quality instruments working at their best.
ACCESSORY TYPES
- pH electrodes & reference electrodes –
designed for general laboratory use, wastewater samples and specialized applications. They provide stable response and fast temperature adjustment. - Conductivity cells & TDS sensors –
available in 2-cell and 4-cell designs for low, medium and high conductivity ranges. These sensors ensure consistent readings and easy maintenance. - DO probes –
optical or polarographic probes for dissolved oxygen meters. They support fast stabilization and long-term operation in water monitoring. - Turbidity accessories –
cuvettes, cleaning kits and alignment tools that keep turbidity meters accurate and repeatable over time. - Standards, buffers & reagents –
calibration solutions for pH, conductivity, DO and colorimetric tests. These ensure reliable, traceable results in each measurement. - Flow cells, cables & holders –
accessories that improve measurement stability during continuous or inline water testing.
FEATURED: COMPLETE WATER QUALITY SUPPORT
COLO.Science helps you maintain all water quality instruments with the right accessories and calibration solutions. In addition, our LabServis team supports installation, training and routine calibration for reliable performance.
Water quality accessories
Showing 1–24 of 35 results
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Water quality accessories
Fluoride (F-) Ion Selective Electrode 5~45 ℃
COLO.Science · Fluoride Ion Selective Electrode
PRO6240 is a fluoride ion selective electrode for F– measurement with compatible ISE meters, crystalline-state membrane and BNC(Q9) connector.
F– ISE · 10-1–10-6 M · Crystalline membrane · Ø12×120 mm · BNC(Q9) · SKU PRO6240
SKU: PRO6240 -
Water quality accessories
Fluoride (F-) Combined Ion Selective Electrode
COLO.Science · Combined Fluoride Ion Selective Electrode
PRO6237 is a combined fluoride ion selective electrode for F– measurement with compatible ISE meters, integrated reference function and BNC(Q9) connector.
F– combined ISE · 10-1–10-6 M · Crystalline membrane · Ø12×120 mm · BNC(Q9) · SKU PRO6237
SKU: PRO6237 -
Water quality accessories
Sodium (Na+) Combined Ion Selective Electrode
COLO.Science · Sodium Na Combined Ion Selective Electrode
PRO6236 is a sodium Na combined ion selective electrode for Na+ measurement with compatible ISE meters, integrated reference function and BNC(Q9) connector.
Na+ combined ISE · 10-1–10-6 M · Glass membrane/body · Ø12×120 mm · BNC(Q9) · SKU PRO6236
SKU: PRO6236 -
Water quality accessories
3 in 1 pH composite electrode Ag/AgCl (BNCQ9 & 4-pin aviation) 0-14pH
COLO.Science · 3 in 1 pH Composite Electrode
PRO4153 is a 3 in 1 pH composite electrode with Ag/AgCl reference, integrated temperature probe, 0–14 pH range and BNC(Q9) + 4-pin aviation connection.
pH 0–14 · Ag/AgCl · 3 M KCl · Polycarbonate · 5–60°C · BNC(Q9) + 4-pin · SKU PRO4153
SKU: PRO4153 -
Water quality accessories
pH composite electrode Ag/AgCl Φ12×120 mm BNC(Q9)
COLO.Science · pH Composite Electrode
PRO6140 is a pH composite electrode with Ag/AgCl reference, glass body, single ceramic junction, 0–14 pH range and BNC(Q9) connection.
pH 0–14 · Ag/AgCl · 3 M KCl · Glass · 5–60°C · BNC(Q9) · SKU PRO6140
SKU: PRO6140 -
Water quality accessories
pH Composite Electrode High Temperature Resistance –5 to 110 °C
COLO.Science · High Temp Resistance Electrode
PRO6149 is a high temp resistance electrode for pH 0–14 measurement, with glass body, ceramic junction, Longlife reference, 3 M KCl and S7 connector.
pH 0–14 · –5 to 110 °C · Glass body · Ceramic junction · 3 M KCl · S7 · SKU PRO6149
SKU: PRO6149 -
Water quality accessories
Standard Polycarbonate pH Composite Electrode Ag/AgCl Φ12×120 mm
COLO.Science · pH Composite Electrode
PRO6134 is a pH composite electrode with Ag/AgCl reference, 0–14 pH range, 3 M KCl fill solution, polycarbonate body and BNC(Q9) connector.
pH 0–14 · Ag/AgCl · 3 M KCl · Polycarbonate · 5–60°C · BNC(Q9) · SKU PRO6134
SKU: PRO6134 -
Water quality accessories
pH composite electrode (Low maintenance) Premium unfilable BNC(Q9)
COLO.Science · Low Maintenance pH Composite Electrode
PRO6142 is a low maintenance pH composite electrode with premium unfillable design, open junction, Longlife reference, 0–14 pH range and BNC(Q9) connector.
pH 0–14 · Unfillable · Open Junction · Longlife Ref. · Polycarbonate · 0–80°C · BNC(Q9) · SKU PRO6142
SKU: PRO6142 -
Water quality accessories
Unfillable Polycarbonate pH composite electrode Ag/AgCl Φ12×120 mm BNC(Q9)
COLO.Science · Unfillable Polycarbonate pH Composite Electrode
PRO6136 is an unfillable polycarbonate pH composite electrode with Ag/AgCl reference, single POM junction, 0–14 pH range, 5–60 °C operation and BNC(Q9) connector.
pH 0–14 · Ag/AgCl · Unfillable · Polycarbonate · Single POM · 5–60°C · BNC(Q9) · SKU PRO6136
SKU: PRO6136 -
Water quality accessories
Cleanable pH composite electrode
COLO.Science · Cleanable pH Composite Electrode
PRO6041 is a cleanable pH composite electrode with movable plastic grinding mouth, 3 M KCl fill solution, Longlife reference and BNC(Q9) connector.
pH 0–14 · 3 M KCl · Polypropylene · Longlife Ref. · 0–80°C · BNC(Q9) · SKU PRO6041
SKU: PRO6041 -
Water quality accessories
pH composite electrode (Low conductivity) for ultra-pure water
COLO.Science · Electrode for Ultra Pure Water
PRO6143 is a pH composite electrode for ultra-pure water and low-conductivity samples with Longlife reference, porous PTFE junction, epoxy body and S7 connector.
pH 0–11 · Low conductivity · Longlife Ref. · Porous PTFE · Epoxy · 0–80°C · S7 · SKU PRO6143
SKU: PRO6143 -
Water quality accessories
Ultra-Pure Premium Glass pH Electrode for Low-Conductivity Water / Tris
COLO.Science · Ultra-Pure Water Electrode
PRO5981 is a premium glass ultra-pure water electrode for low-conductivity water and Tris buffers, with Longlife Reference, 3 M KCl and S7 connector.
pH 0–11 · Glass · Longlife Ref. · 3 M KCl · 0–80°C · S7 · SKU PRO5981
SKU: PRO5981 -
Water quality accessories
Long pH composite electrode (260 mm, 12 mm dia) with glass body
COLO.Science · Long pH Electrode
PRO6147 long pH composite electrode with glass body, ceramic junction, Longlife reference and S7 connector.
pH 0–14 · Φ12×260 mm · Glass · Ceramic · 0–80°C · S7 · SKU PRO6147
SKU: PRO6147 -
Water quality accessories
HF-resistant pH composite electrode for aggressive chemical media
COLO.Science · HF-Resistant pH Electrode
PRO6152 is a pH electrode HF acid resistance model with PP body, ceramic junction, Longlife reference and S7 connector.
pH 2–11 · PP body · 3 M KCl · 0–60°C · Ø12×120 mm · S7 · SKU PRO6152
SKU: PRO6152 -
Water quality accessories
pH composite electrode (HF acid titrate) (S7) 2-11 pH
COLO.Science · pH Electrode HF Acid Titrate
PRO6151 is an HF-resistant pH composite electrode for acid titration, with PP body, ceramic junction, pH 2–11 range and S7 connector.
pH 2–11 · PP body · Ceramic junction · Longlife Ref. · 3 M KCl · 0–60°C · S7 · SKU PRO6151
SKU: PRO6151 -
Water quality accessories
Composite Alkali Resistance pH Electrode (S7)
COLO.Science · Alkali Resistance pH Electrode
PRO6150 is an alkali resistance pH electrode with glass sensor, ceramic junction, Longlife reference and S7 connection.
pH 0–14 · Glass · Ceramic junction · Longlife Ref. · 0–80°C · S7 · SKU PRO6150
SKU: PRO6150




















