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Screw Plug Immersion Heaters

The screw plug immersion heater is constructed of a U-shaped tubular member that is welded or brazed into the screw plug, and also has a junction box for electrical connection. The screw plug immersion heater is screwed directly through the threaded opening of the tank wall or by means of a mating pipe joint, half pipe joint or welded flange.

Highly recommended products from other Immersion series:

Flange Immersion Heater | Water Immersion Heater



Screw plug heaters are available in several different sizes, including 1⁄2", 3⁄4", 1", 11⁄4", 2", and 21⁄2" pipe threads. With a wide range of screw plug sizes, power ratings (in kilowatts), voltage, jacket material, terminal fittings and thermostats, these compact heaters are ideal for all types of applications. Click here to learn more about heater types


Electric voltage (v)24,36,72,100,110,115,120,220,230,235,240,380
Power (w) power error (%)150 ~ 5000 + 5 ~ 10
The length (mm) (mm)180 ~ 1800 length error±2
Pipe diameter ф (mm)8,10,12,14,18,23,33, pipe diameter error + / – 0.05 (mm)
Electrical and thermal conversion efficiency (%)Electrical and thermal conversion efficiency (%) of 95% or more the highest working temperature (℃) 1200 or less, according to the purpose can be designed as any value of 40-1200 ℃.
Electric radiation conversion efficiency (%)Electric radiation conversion efficiency of 70% or higher maximum heating temperature (℃) 1400 or less
Method to the firing rate (%)Method to the firing rate (%) of 88% or higher infrared wavelength (2.0 ~ 10 microns)
Color temperature (k)Color temperature (k) from 800 to 1500 the average service life (h), 6000
TestResistance to cold and hot shock 1.2 times under voltage, forced or room temperature cooling 21 cycle without exception. Leakage current (mA) 1.36 times the voltage of 0.5 or less mA

The immersion heater with temperature thermostat control allows the user to adjust the temperature. The heater with safety guard prevents the temperature from reaching the extreme temperature of the container and prevents the heater from being damaged. 

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