Rapidox 2112 Multiplex

Product Information

The Rapidox 2112 Multiplex is housed in a 19″ rack mount unit and allows a programmed sequence of gas samples to be fed to a single gas analyser, thus saving money and space requirements.

Designed to work seamlessly in conjunction with any Cambridge Sensotec Rapidox gas analyser (R1100, R2100, R3100 & R7100 ranges), the unit can also be used with other manufacturers analyser equipment if required.

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Product Information

Available with 5, 10 or 15 independent gas inlet ports that are fed to a single gas outlet using a system of electronically controlled solenoid valves, the Multiplex comes in two designs: a more basic flow-through design or a more complex bypass design (see schematics on page 2). The bypass design is more suitable for long-distance tubing lengths as the sample ports are all sampled continuously via a secondary pump. This dramatically reduces the delay before a stable reading is obtained, when changing from one channel to the next.

Using the bespoke Rapidox software supplied with the 2112, the Multiplex is intended for fully automatic stand-alone operation. However, there is also a manual override dial on the unit allowing the user to select an individual channel of interest.

The Multiplex software allows the user to program how long each sample line is sampled for before moving to the next. If a channel is not required then it can be de-selected in the software and it will be skipped during the measurement cycle. The software also synchronises with the Rapidox analyser so that the user can easily tell which channel is being sampled at any time. The channels can be renamed for ease of identification and during data-logging, they are identified by unique colour coding on the live time graph.

Due to the manual facility, the Multiplex can be used with any other gas sampling systems or gas process applications requiring multiple sample points.


  • Specifically designed for use with a Rapidox gas analyser
  • Flexible choice of channels used
  • Flow-through version for pressurised gas
  • Bypass version for long sample tube lengths
  • Housed in a sturdy 19″ rack mount case
  • Manual or Automatic operation
  • Software for programming a sample sequence
  • Can be used with other manufacturers Gas Analysers

Product Specification

Type Measurement
Supply Voltage90–260VAC, 50/60Hz
Power consumption30W (max)
Analyser dimensions370mm (W) x 440mm (D) x 130mm (H)
Warm-up time60 seconds at 20°C
Normal operating temperature5–35°C
Normal operating pressure900–1100 mbar absolute
Normal operating humidity10 – 90% RH
SamplingManual or Automatic modes via 5, 10 or 15 independent gas inlet ports
Automatic controlVia RS232 communications port using bespoke multiplex software provided
ConnectionsNipple fittings for 6mm OD / 4mm ID sample tubing (FEP recommended)
FuseT2A H250V 5 x 20mm glass

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