Type: 9STB. Immersion heaters with 182mm x 130mm x 120mm plastic enclosure.

Fittings 1″1/2, M45x2. With mechanical thermostat or electronic temperature control. With or without manual reset thermostat.

Main applications: Liquid heating, hot water circuits, containers and buffer tanks.

This series is intended for high-end low-power devices, single phase. It combines a modern aesthetic, a waterproof plastic housing, shock resistant, and settings viewing through a transparent window in polycarbonate. It is available with thermostat control or with an easy-to-use electronic controller, both of them with or without safety limiter.

They exist in:

– 4 standard power levels: 1kW; 1,5 kW; 2kW; 3kW.

– 2 types of standard fittings: 1″1/2 and M45x2

– 2 types of surface load density: 5W/cm² and 10W/cm². See technical introduction to optimize the surface load.

Heater tube material: 8mm dia. AISI 304 or Incolloy 800 (AISI 316; AISI 321; Incolloy 825 on request).

Fitting material: brass, swiveling on housing, brazed on tubes. (AISI 304 or AISI 316, TIG welded, or brazed, models are available on request). Supplied without gasket and without nut. See accessories below.

Thread: 1 “1/4 or 1 1/2” BSPP (ISO 228). Metric thread M45x2 available on request.

Temperature control, 2 types available:

1/Electronic temperature controller with permanent digital display of temperature measured value.

– Temperature display Accuracy: ±1°C (±2°F) ± one digit.

– Temperature range  0 to 120°C (-32+250°F).

– Temperature sensor: NTC

– Display is configurable in degree or tenth of a degree.

– On-off temperature control action (relay output).

– Adjustable differential.

– If the temperature sensor is broken, the output power is cut off and the error is displayed.

2/ Mechanical thermostat, temperature range 30-90°C (85-195°F)

Enclosure: extremely robust, in thick PA66, designed for outdoor installation, IP65 and IK10. It also includes:

– A fuse to protect internal circuits (only in electronic version).

– An on- off switch (Built on thermostat shaft on thermostat version)

– A polycarbonate transparent window allowing access to the settings. This window can be secured with seals. This case also includes a separate lid ,with independent seals, providing access to electrical connections

In models with failsafe manual reset limiter, reset can be accessed after opening the window.

Cable glands: Located on a removable mounting board, providing easier access for connections, fitted with one M25, PA66, and one more hole for M25, closed by a plastic cap.

Thermowell: in standard two thermowells in AISI304, dia.8 x 7 mm, 135mm length.

Electric connections:

Made on a built-in terminal block, with 5 terminals 6mm² and 5 terminals 2.5mm².

This terminal block is provided with a strap between terminals 1 and 2. By removing this strap, it is possible to connect an additional safety device, a remote control, or a timer.

Support grid: 1 grid AISI 304 for lengths from 400 to 600mm, 2 grids above.

Not heating immersed zone: 50mm.

Surface load: standard 5 W/cm² or 10 W/cm², other values on request.

Voltage: 220-240V single phase only.

Standard options:

Manual reset limiter, preset at : 60°C, 80°C, 100°C, 110°C, 130°C. (140°F, 176°F, 212°F, 230°F, 266°F)

Variants on request:

– 30-110°C adjustable thermostat (85-230°F)

-Thermal cut out inside a thermowell.




2D&3D Drawing

Main references with 30-90°C (85-195°F) adjustable thermostat*

5W/cm²; 1″1/2** brass fitting, without manual reset thermostat.

Power 1kW 1.5kW 2kW 3kW
Length (mm) 170 240 300 440
AISI 304 Reference 9STBA5HV010V8170 9STBA5HV015V8240 9STBA5HV020V8300 9STBA5HV030V8440
Incolloy 800 reference 9STBA5HV010VK170 9STBA5HV015VK240 9STBA5HV020VK300 9STBA5HV030VK440


10W/cm², 1″1/2** brass fitting, without manual reset thermostat.

Power 1kW*** 1.5kW 2kW 3kW
Length (mm) 135 135 170 240
AISI 304 Reference 9STBA5HV010B8130 9STBA5HV015V8130 9STBA5HV020V8170 9STBA5HV030V8240
Incolloy 800 reference 9STBA5HV010BK130 9STBA5HV015VK130 9STBA5HV020VK170 9STBA5HV030VK240


5W/cm², 1″1/2** brass fitting, with manual reset thermostat set at 100°C (212°F)****

Power 1kW 1.5kW 2kW 3kW
Length (mm) 170 240 300 440
AISI 304 Reference 9STBA5HV010V817N 9STBA5HV015V824N 9STBA5HV020V830N 9STBA5HV030V844N
Incolloy 800 reference 9STBA5HV010VK17N 9STBA5HV015VK24N 9STBA5HV015VK30N 9STBA5HV030VK44N


10W/cm², 1″1/2** brass fitting, with manual reset thermostat set at 100°C (212°F)****

Power 1kW*** 1.5kW 2kW 3kW
Length (mm) 135 135 170 240
AISI 304 Reference 9STBA5HV010B813N 9STBA5HV015V813N 9STBA5HV020V817N 9STBA5HV030V824N
Incolloy 800 reference 9STBA5HV010BK13N 9STBA5HV015VK13N 9STBA5HV020VK17N 9STBA5HV030VK24N

*Type with electronic temperature control: replace HV by HY in the reference

** M45x2 brass fitting instead of 1″1/2, replace A5 by A9 in the reference.

***: only two heating elements

References of accessories in option (not included in the product, must be ordered separately):



Other accessories and drawings: see last section of this catalogue.