Testo Inc., Flanders, N.J., released a full-color brochure describing the testo 350, a portable analyzer for low NOx and low CO testing with a resolution of 0.1ppm. The unit has pre-calibrated smart sensors for quick field changes plus high NOx and high CO measuring capabilities with specially hardened sensors and an integrated sample dilution system. It has an expansive on-board memory, remote operation, RS232 interface and a choice of probes.