This is a range of small digital instruments designed to measure
toxic gas levels and to warn when pre-set levels have been exceeded.
The development of the Responder range was carried out on behalf
of MSA Inc. of Pittsburgh PA. They wanted a unit that was simpler,
easier to use and, most of all, less expensive to manufacture than
their existing product. The Responders have considerably better
functionality, a more expensive appearance and easier manufacturing.
They are also very cost effective to manufacture. Sales are considerably
above the original projections.