MIK-PH5014 Hydrofluoric acid pH sensor

The MIK-PH5014 is a glass pH sensor with a pH-sensitive glass membrane that is resistant to hydrofluoric acid (HF). It is designed for pH measurement in water containing hydrofluoric acid.

Hydrofluoric acid attacks ordinary glass, so the glass membrane of a standard pH electrode can be damaged quickly, leading to drift and a short service life. The MIK-PH5014 uses a special HF-resistant glass membrane for these applications.

• pH measurement in water containing hydrofluoric acid
• Dilution control of hydrofluoric acid in semiconductor wafer manufacturing and chip production
• Industrial wastewater, including electroplating and other fluoride-containing process water

According to its application data, the sensor can be used in media containing fluorides (hydrofluoric acid) up to 1000 mg/L HF. Please send us your HF concentration, temperature and pH range so we can confirm suitability.

• Measuring range: 0–14 pH
• Zero potential point: 7 ± 0.5 pH
• Slope: >98%
• Practical response time: <1 min

The membrane resistance is generally below 250 MΩ. Because this is a high-impedance signal, use a pH meter with a high-impedance input and a low-noise cable.

• Temperature: 0 to 130 °C (with general cables)
• Pressure: 2.5 bar at 25 °C

Please tell us your process temperature and pressure so we can confirm the suitable configuration.

The sensor uses a PG13.5 thread, a widely used standard for 12 mm process electrodes, fittings and flow cells.

NTC 10 kΩ or Pt1000. Choose the element that matches your pH meter.

The sensor uses a low-noise cable to maintain a stable signal from the high-impedance glass electrode.

Asmik options include the MIK-PH6.5, MIK-PH8.0 and MIK-DC-P2, which support NTC10K and Pt1000 temperature compensation.

Yes. The MIK-PH5014 is used for hydrofluoric acid dilution control in semiconductor wafer manufacturing and chip production. Please tell us your process details, such as HF concentration and cleanliness requirements, so we can confirm the configuration.

Calibrate with standard buffer solutions that bracket your process pH, such as Asmik standard pH calibration solutions. Rinse the sensor thoroughly between the process medium and the buffers.

Service life depends on HF concentration, temperature, pH and cleaning conditions. Even with an HF-resistant glass membrane, higher concentrations and temperatures generally shorten the life of the electrode, so regular checks and calibration are recommended.

• Rinse the sensor after contact with HF-containing media.
• Keep the glass membrane wet and store the sensor with its protective cap when not in use.
• Check the slope and zero point regularly and recalibrate when needed.
• Follow safety procedures for handling hydrofluoric acid during maintenance.

To help us select the correct configuration, please provide:

• Application (wastewater, semiconductor HF dilution, other)
• HF concentration and pH range
• Process temperature and pressure
• Temperature compensation element (NTC10K or Pt1000)
• Cable length and installation fittings
• Matching pH meter (if required)
• Quantity

Send your requirements to info@asmik.com or contact us via WhatsApp at +86 13325716921.