The Cambridge Bench pH Meter

This pH meter was manufactured in 1959 by the Cambridge Instrument Company at their London factory.

The Cambridge Instrument Company can trace its roots back to the Cambridge Scientific Instrument Company.  A company founded in 1881 by Albert Dew Smith and Horace Darwin, the youngest son of Charles Darwin.  The original activity of the business was to manufacture and supply instruments to the laboratories of Cambridge University.  

Since the 1960s, the company has gone through numerous reorganisations, mergers and acquisitions.  Its various activities are now split across a number of companies.

Despite being more than 50 years old, this particular instrument is in excellent condition.  A testament to the high quality materials used and the skilled workmanship of the time.

One wonders what activities this meter has witnessed over its long life......

Was it used for cutting edge scientific research or was it used for more mundane, but equally important, quality control routines ? 

Photo of the The Cambridge pH Meter with a younger cousin

Click here for information on slightly newer pH meters

Click here for more photos of the Cambridge pH Meter

Click here for more information about the Cambridge Instrument Company

Model CM-30R Conductivity Meter

The Model CM-30R is a high performance desktop type conductivity meter from the R Series range of laboratory-type water quality measuring instruments.

The standard instrument package comes with everything you need to get started including conductivity cell, sensor stand, sensor holder, ac adapter, beaker, instruction manuals etc..

The Model CM-30R offers the following advanced features:

• Large easy to read colour display
• Can operate on 100 to 240V, 50/60 Hz AC power
• LAN interface
• USB interface, can be used to download data to a USB memory stick.
• Intelligent conductivity cell sensor with internal storage of calibration data and history
• Meter has built-in data storage including date, time, sample temperature, measurement result etc.
• Capable of controlling auto-sampling turntable
• Full compliance with European Community EMC and LVD directives (CE Marked)
• European ROHS compliant using lead free materials

For further information please check our web page and brochure on the R Series