The GasAlertQuattro four-gas detector provides continuous visual confirmation of detector operation and compliance and is suited to a wide range of industrial applications, including confined space entry. The GasAlertQuattro is fully compatible with BW’s MicroDock II automatic test and calibration system. BW Technologies by Honeywell,www.gasalertquattro.com, (403) 248-9226. Circle 251 Visual compliance