Unused TTD series steel dual scale tridicator thermometer, gauge. Model TTD404 Made in China. Used to measure temperature & pressure on same dial. Commonly used for hot water and steam pressure applications in boilers. Pressure range 0-200psi/kPa, temperature range 70°-320°F(20°-160°C). 3 in(75mm) Steel case Painted black, 2.5 in (63mm) dial size 1/4 in. NPT. Brass wetted parts, acrylic lens. All prices negotiable!