Providing heat to regulate liquid temperatures from 32°C to 88°C (90°F to 190°F), the FTH series flow through heaters employ a titanium element that resists corrosion. Its enclosure is made of ABS plastic and is water resistant. The heater is a viable contender for maintaining water temperature in test labs and industrial plants. Price starts at $525. OMEGA ENGINEERING INC., Stamford, CT. (800) 872-9436.