A dual-input thermometer offers a 0.8-in. LCD displaying T 1, T2 or T1-T2 with a resolution to 0.1° and a basic accuracy of 0.05 percent. The multifunction 41/2 digit LCD displays two channels plus elapsed time. Features include choice of temperature scales, programmable HI/LO audible alarms, as well as AVG, REL, and HOLD functions. The Model 421502 provides dual type J/K thermocouple inputs and includes 2 type K bead wire probes; the Model 421504 provides switchable inputs for 100-ohm Pt-385 and Pt-3926 RTDs. Both come with rubber holster and 9-V battery.
Extech Instruments Corporation, 335 Bear Hill Road, Waltham, MA 02154. Tel: (617) 890-7440; Fax: (617) 890-7864.