Profile: TTI Instruments, Inc. supplies industrial instruments. Our products are controllers, counters, digital thermometers, distance meters, field communicators and flow instruments. Our extech 39272 pocket thermometer offers fast response, auto power off, data hold and min / max functions. It comes complete with a wrist strap and AAA battery. Our extech dt100 ultrasonic distance meter offers summation of consecutive length measurements, automatic area & volume calculations, store / recall up to 3 readings and a built-in white LED flashlight. It comes complete with a 9V battery.