We asked our Environmental Safety people for a recommendation when we were planning on using Carbon Monoxide and they provided us with a Nighthawk model KN-COPP-3. It works on 110 vac with battery backup. Richard A. Berger Washington University Medical School On Thu, 9 Nov 2006 12:15:56 -0500, Jay Brandes <[log in to unmask]> wrote: >Dear Isogeochemers- I was wondering if there has been any new advice on >what kind of CO monitor to buy for a IRMS lab? Looking back it seems >like the advice was to go for an expensive unit that requires periodic >calibration. Is this thought to still be the case or can one get by >with the cheaper units, and if so (or if not) what units are people >happy with after having used them? >Thanks in advance-Jay Brandes, Skidaway Institute of Oceanography >=========================================================================