What is the typical accuracy of a digital pH meter like the CD640?

For this class of equipment, accuracy is commonly around ±0.01 to ±0.02 pH units, depending on calibration and electrode condition.

Does this unit come with calibration solutions?

Used units typically do not include calibration solutions. Buyers should plan to source appropriate pH buffer solutions (e.g., pH 4, 7, 10) separately.

What maintenance does a digital pH meter require?

Regular maintenance includes cleaning the electrode, storing it correctly (e.g., in storage solution), and periodic calibration to maintain accuracy.

Is the electrode included with the meter?

For a used listing, it is common for a pH electrode to be included, but its condition and remaining lifespan should be verified with the seller.

Can this meter be used for continuous monitoring?

While capable of taking frequent readings, portable digital pH meters like the CD640 are typically designed for spot checks rather than continuous, long-term process monitoring.

used Equipment

Available

Verified seller

WPA - CD640 Digital PH Meter

Name: CD640 Digital PH Meter
Brand: WPA
SKU: 49353664.1607
Price: 70 GBP
Availability: InStock

Price: £ 70

This listing is for a WPA CD640 digital PH meter

Cambridgeshire, United Kingdom

5,791 km away

Model Number

CD640

Stock Number

49353664.1607

Machinery Masters View

Typical context for this category of equipment. Always confirm specifics with the seller.

Applications & Use Cases

Monitoring pH levels in laboratory samples for research and quality control.
Ensuring correct pH balance in pharmaceutical production processes.
Analysing water quality in environmental testing and treatment facilities.
Controlling pH in food and beverage manufacturing for product consistency and safety.
Educational purposes in science laboratories for practical demonstrations and experiments.

Typical Specifications

Typical measurement range: Typically 0 to 14 pH, with resolution commonly around 0.01 pH.
Power supply: Often battery-operated for portability (e.g., 9V PP3) or mains powered via an AC adapter (e.g., 230V UK standard).
Display type: Commonly features a clear LCD digital display for easy reading of pH values.
Calibration: Typically requires 1, 2, or 3-point calibration using standard buffer solutions.
Temperature compensation: Many units offer manual or automatic temperature compensation (ATC) to ensure accuracy across varying sample temperatures.
Electrode type: Typically uses a combination glass electrode, often replaceable.

Frequently Asked Questions

For this class of equipment, accuracy is commonly around ±0.01 to ±0.02 pH units, depending on calibration and electrode condition.

Machinery Masters Intelligence. General guidance for this category of equipment only, not a substitute for the seller's exact specifications. Always confirm details with the seller.