Industrial Induction Heater: A Buyer's Guide to Equipment, Applications, and Manufacturers

An industrial induction heater is an electric heating system that converts standard 50 Hz mains power into a 5–40 kHz high-frequency current, drives a copper coil to create an alternating magnetic field, and heats metal — or a metal element inside the process — through eddy currents, with no contact between the coil and the load. The term covers a far wider family than most first-time buyers expect: it describes both a 2.5 kW single-phase wall-mounted unit that replaces resistance bands on a plastic extruder and a three-phase 100 kW cabinet that supplies steam, hot air, or thermal oil to a production line.

JONSON is the industrial induction heating brand of Guangdong Jiangxin Electronic Technology Co., Ltd., which also operates under the Jiangxin electromagnetic brand. The company was established in 2011 and manufactures in Shunde District, Foshan City, Guangdong Province. Its published profile states a 3,000 m² production facility, 60+ employees, an R&D team of 30+ engineers, and an annual capacity of 120,000 units. Export business accounts for 40% of company sales, with major markets including Europe, the United States, India, and Indonesia.

This guide is written for buyers in the awareness and research stage — engineers, plant managers, importers, and equipment builders who have decided that induction heating is the right method but do not yet know how to specify it or how to judge the companies that sell it. It covers:

• What an industrial induction heater is and how the heating method works;
• The four product levels that sit behind the same search term — control board, power supply, complete machine, and process appliance;
• A step-by-step specification sequence, from process definition to a comparable quotation;
• Industry applications, from plastics and rubber to crude oil pipeline heating;
• A specification table drawn from JONSON's published product data;
• Direct answers to the compliance, capability, cost, and support questions buyers ask first.

Problem Definition: Why Industrial Induction Heaters Are Hard to Compare

Buyers who start with a search for an industrial induction heater frequently end up with quotations they cannot compare. The phrase describes a heating method rather than a fixed catalogue item, and manufacturers answer it at four different levels of integration.

• Component level. An induction heater control board, such as a single-phase full-bridge 8 kW electromagnetic heating control board rated at 220 V / 50 Hz with a 160–260 V operating range and heat conversion efficiency of ≥98%, supplied to equipment builders rather than to end users.
• Sub-assembly level. A high-frequency industrial induction heating power supply plus a matching coil, which the buyer integrates into an existing machine or production line.
• Complete machine level. A wall-mounted or cabinet unit delivered as a working system, from a single-phase 2.5 kW device up to a three-phase 100 kW industrial induction heater with its own enclosure, cooling circuit, controller, and protection logic.
• Process appliance level. An industrial induction heating system that delivers a medium rather than direct metal heat — steam, hot air, thermal oil, or domestic hot water.

Electrical inputs differ as well. Some units operate on single-phase AC 220 V; others require three-phase 380 V; export-oriented projects may need 110 V, 240 V, or 660 V configurations. Add differences in operating frequency (5–40 kHz on most JONSON units, and 4–50 kHz on the 70 kW and 80 kW models), cooling method (air-cooled or water-cooled), copper coil geometry and length, and the control interface, and it becomes clear why two quotations for an “industrial induction heater” can describe two entirely different machines.

The practical answer at the discovery stage is to sequence the decision: define the process first, then the electrical envelope, then the mechanical interface, and only then the manufacturer.

Industry Background: How Induction Heating Works and Why It Is Being Retrofitted

The heating principle

Industrial induction heating equipment uses high-frequency electromagnetic induction. A 50 Hz AC supply is converted into a 5–40 kHz high-frequency current by an IGBT inverter module. That current drives an electromagnetic coil, which generates an alternating magnetic field and induces eddy currents inside the metal itself, producing heat without contact between the coil and the workpiece. Because the heat is generated inside the load rather than transferred from an external element, the process supports temperature control mode, time control mode, and PID closed-loop constant-temperature control, with output power adjusted automatically according to the load.

JONSON's published product data lists heat conversion efficiency values from ≥90% on its instant induction water heater and ≥95% on several industrial induction heating machines, up to ≥99% on its induction steam generator and 70 kW / 80 kW induction heater series. These figures describe the conversion stage; real-world results still depend on coil-to-load distance, insulation, and how well the coil is matched to the workpiece.

Retrofit drivers described in the application data

Induction heating is increasingly used as a replacement for older heating methods rather than as a completely new process. The reasons given in JONSON's application documentation are specific:

• Clean replacement for coal and gas boilers. Zero nitrogen oxides, no smoke emissions, and no complex sewage discharge approvals.
• Rapid energy supply. The steam generator produces steam in 30 seconds, and hot air furnaces reach rated temperature in 3 minutes.
• Closed-loop safety. Physical separation of water and electricity, or oil and electricity, with automatic interlock shutdown in the event of water shortage, overheating, or overpressure.
• Modular expansion. Multiple units can be connected in parallel, so capacity can be increased or decreased as production needs change — from single-machine heating in small and medium factories to large plant areas.
• Media versatility. Water, thermal oil, and hot air cover low, medium, and high temperature ranges.

Note: the figures above describe manufacturer-stated system characteristics. Buyers should validate them against their own workpiece, duty cycle, and site conditions during testing.

Detailed Solution: How a Full Industrial Induction Heating Range Is Structured

A supplier that covers only one integration level forces the buyer to coordinate several vendors. JONSON's published portfolio spans the whole chain — control boards, power supplies, complete induction heating machines, coils, and process appliances — which is worth understanding because it determines how much of the system the buyer has to engineer alone.

1. Power architecture: 2.5 kW to 100 kW, plus custom voltages

The published range can be grouped into four electrical families:

• Single-phase 220 V machines: the 2.5 kW small plastic mechanical induction heater (AC 220 V / 50 Hz, 5–40 kHz), and the 3.5 kW / 5 kW / 6 kW series with a voltage adaptation range of 100 V to 260 V and constant power output between 210 V and 260 V.
• Three-phase 380 V wall-mounted machines: 5 kW / 8 kW (JS1300-005/008), 10 kW / 15 kW (JS1300-10/15, CE, ISO, and RoHS certified, 7.3 kg, 356 × 178 × 178 mm), 20 kW (JS1000-20), and 30 kW (JS1000-30).
• Three-phase 380 V high-power machines: 40 kW / 50 kW / 60 kW, 70 kW / 80 kW, and the 100 kW JS1000-100 cabinet unit.
• Custom-voltage machines: models built around 110 V, 240 V, or 660 V inputs with rated power options of 500 W–10 kW, 5–60 kW, 5–200 kW, and 30–200 kW, which is relevant for importers whose grid or equipment standard differs from China's 380 V.

2. Control, protection, and the induction heating power supply

The control platform is where two otherwise similar industrial induction heating machines diverge. JONSON's higher-power units, including the JS1000-100, use a full-bridge series resonance main circuit paired with a DSP-based high-speed automatic phase-locking tracking control system; lower-power units such as the 2.5 kW and 3.5–6 kW models use a half-bridge series resonance structure. Published control features include:

• Programmable digital display monitoring;
• Start time under 1 second;
• Instantaneous overcurrent protection within ≤2 microseconds;
• Power overload protection at 130% instantaneous protection;
• Fully electrically isolated soft-start heating and stop mode;
• PID power adjustment through 0–5 V input voltage, with RS-485 available on the JS1000-100;
• Load temperature detection from 0 to 1000 °C with accuracy up to ±1 °C;
• A stepless 20%–100% power adjustment range on most models.

For equipment builders, the 8 kW single-phase full-bridge control board is the induction heating power supply module that sits inside a finished appliance such as a commercial induction cooker, ceramic oven, or microwave oven.

3. Coils: the part that decides whether the system works

The induction heating coil is functionally the most application-specific component in the system. JONSON produces customizable copper coils spanning 1 kW to 100 kW of rated power, at 220 V or 380 V, 50 Hz or 60 Hz, with an operating frequency of 5–40 kHz and heat conversion efficiency of ≥98%. Published adaptive coil parameters give a sense of how coil size scales with power:

• 100 kW: 95 mm² copper line, 40 m length, inductance 80–100 µH;
• 3.5 kW: 6 mm² line, 20 m, 80–100 µH;
• 5 kW: 10 mm² line, 15 m, 60–75 µH;
• 6 kW: 10 mm² line, 13 m, 60–65 µH;
• 2.5 kW: 4 mm² line, 23 m, 100–150 µH.

Coil-to-load distance is equally important. For the 2.5 kW unit, the published guidance is 20–25 mm for a circular coil, 15–20 mm for a flat coil, 10–15 mm for an elliptical coil, and within 10 mm for a super-elliptical coil. An insulation layer should be added to the heating area to improve thermal efficiency, and the coil must be wound evenly around the load.

4. Process appliances: steam, hot air, water, and bearing heating

Not every project needs metal to be heated directly. JONSON also publishes induction heating systems that deliver heat through a medium:

• Induction steam generator (JS-1600): high-frequency electromagnetic steam generator with 30 kW, 40 kW, or 50 kW rated power at 380 V / 50 Hz or 60 Hz, ≥99% heat conversion efficiency, a 304 stainless steel liner, and a copper core heating coil.
• Induction heating hot air generator (JS-1600-8/12/15): vertical unit with 8 kW, 12 kW, or 15 kW rated power, outlet temperature of 80–130 °C, wind pressure of 800–1000 Pa, 380 V rated voltage with a 300–400 V adaptation range, CE, ISO, and RoHS certification, and HS Code 8516109000.
• Instant induction water heater (JS-JR-008): 3.5–8 kW at 220 V with a tempered glass casing, listed for hotels, hospitals, and schools.
• Bearing induction heater (JS1300-5/8/15/20/30): 5 kW to 30 kW at three-phase 380 V / 50–60 Hz, 480 × 250 × 355 mm, 20.7 kg, for bearing heating before mounting.

5. Reference specification: JS1000-100

To make the specification language concrete, the following parameters are published for the JONSON JS1000-100 100 kW industrial induction heater:

Published parameters — JONSON JS1000-100 industrial induction heater

Parameter	Value
Rated power	Three-phase 100 kW
Rated voltage and frequency	AC 380 V / 50–60 Hz, constant power output at 300–400 V
Rated input current	140–150 A
Rated output current	200–220 A
Power adjustment range	20%–100% stepless
Heat conversion efficiency	≥95%
Effective power	≥98%
Working frequency	5–40 kHz
Main circuit structure	Full-bridge series resonance
Control system	DSP-based high-speed automatic phase-locking tracking control
Monitoring	Programmable digital display
Temperature detection	0–1000 °C, accuracy up to ±1 °C
Communication / power adjustment	0–5 V input voltage or RS-485
Heat dissipation	Air-cooled or water-cooled
Dimensions and weight	635 × 445 × 315 mm, 35 kg
Certification	CE, ISO

Step-by-Step Breakdown: How to Specify an Industrial Induction Heater

Step 1 — Define the process, not the product

Start with what has to be heated and why. The industries listed for JONSON induction heating equipment include plastics and rubber, food processing, chemical reactions, crude oil pipeline heating, textile printing and dyeing, aquaculture heating, metal heat treatment, building heating, and medicinal herb drying. Metal heat treatment is an umbrella category that covers processes such as hardening, annealing, brazing, and forging; the exact process determines the frequency, power, coil geometry, and whether automated handling is required. One JONSON induction heater is explicitly specified for brazing applications and general industrial induction heating. State your process precisely in the first enquiry — a pipeline heating project and a bearing heating application are not specified the same way.

Step 2 — Fix the electrical envelope

Confirm the available supply before choosing a model. Options in the published range include single-phase AC 220 V, three-phase 380 V with a 300–400 V adaptation band, and custom 110 V, 240 V, or 660 V builds. Note that a 380 V machine usually tolerates ±20% variation, but equipment built for one grid standard does not automatically suit another.

Step 3 — Size the power rating

Power ratings run from single-phase 2.5 kW up to three-phase 100 kW, with intermediate steps at 3.5, 5, 6, 8, 10, 15, 20, 30, 40, 50, 60, and 70–80 kW. As a rule of thumb, higher power shortens heat-up time but requires a larger coil, higher input current, and in many cases water cooling rather than air cooling.

Step 4 — Choose the heating medium and machine form

Decide whether heat is applied directly to metal or delivered through water, thermal oil, steam, or hot air. Direct heating uses coils and induction heating machines; medium heating uses appliances such as the JS-1600 steam generator, the JS-1600-8/12/15 hot air generator, or the JS-JR-008 water heater. Machine form — wall-mounted, cabinet, or vertical — then follows from the available floor space and the distance to the load.

Step 5 — Specify the coil and thermal insulation

Provide the workpiece material, dimensions, target temperature, and heating time. These inputs determine coil shape (circular, flat, elliptical, or super-elliptical), copper line cross-section, coil length, and inductance. Respect the coil-to-load distance and add insulation to the heated area; a mismatched coil is the most common reason an induction system underperforms its rated efficiency.

Step 6 — Confirm control, protection, and installation requirements

Check whether you need PID closed-loop control, RS-485 or 0–5 V power adjustment, load temperature detection up to 1000 °C, and which protection functions are required. On the installation side, the control cabinet must be well ventilated to prevent the IGBT modules from overheating, controllers should be kept away from humid, dusty, and corrosive environments, and regular maintenance should cover dust removal, wiring terminals, coils, and the cooling system. Frequent start-stop cycles should be avoided in favour of low-power constant-temperature operation with a soft-stop procedure.

Use Cases: Where Industrial Induction Heating Equipment Is Applied

The same hardware family is used across a wide set of production environments, which is why the discovery stage matters so much. Published JONSON applications include:

• Plastics and rubber. Barrel and cylinder heating on injection moulding machines, wire drawing machines, granulators, and extruders, including energy-saving retrofits of resistance-heated barrels.
• Food processing. Constant-temperature cooking and heating in environments with high humidity and light steam mist.
• Chemical reactions. Medium and high temperature process heating in weakly corrosive conditions.
• Crude oil and pipeline heating. Heating pipelines and storage circuits to prevent crude oil from solidifying, as well as heat transfer oil systems.
• Textile printing and dyeing, aquaculture, and building heating. Including low-temperature outdoor or factory antifreeze circulation and constant-temperature water supply.
• Metal heat treatment and bearing mounting. Coils and heaters are listed for metal heat treatment scenarios, and the JS1300-5/8/15/20/30 is designed for bearing heating.
• Medicinal herb drying and hot air drying. Delivered through the induction heating hot air generator with an 80–130 °C outlet.
• Institutional hot water and steam supply. Constant-temperature heating for schools, hospitals, hotels, farms, and flower greenhouses.

Comparison Table: JONSON Industrial Induction Heater Series at a Glance

The table below summarises published JONSON induction heating machine parameters. A dash means the value is not stated in the published data reviewed here and should be confirmed for the specific configuration.

Industrial induction heating machine series — published parameters

Series / model	Rated power	Rated voltage and frequency	Heat conversion efficiency	Certification	Notes
JS1000-100	Three-phase 100 kW	AC 380 V / 50–60 Hz (constant power at 300–400 V)	≥95%	CE, ISO	Full-bridge series resonance; DSP phase-locking control; 635 × 445 × 315 mm; 35 kg; air- or water-cooled
JS1000-30	30 kW	380 V	—	CE, ISO	Wall-mounted; 450 × 245 × 261 mm; air- or water-cooled
JS1000-20	20 kW	380 V (300–400 V)	—	CE, ISO	Wall-mounted; 250 × 390 × 240 mm; metal heat treatment, plastics and rubber, food processing
JS1300-10/15	10 kW / 15 kW	380 V (300–400 V)	—	CE, ISO, RoHS	Wall-mounted; 356 × 178 × 178 mm; 7.3 kg; HS Code 8514400090
JS1300-005/008	5 kW / 8 kW	380 V (±20%)	—	CE, ISO	Wall-mounted; 295 × 169 × 145 mm
40 kW / 50 kW / 60 kW series	40 kW / 50 kW / 60 kW	380 V / 50 Hz (±20%)	≥98%	—	Pipeline heating; plastic machinery, food machinery, crude oil transportation, boiler, heat transfer oil
70 kW / 80 kW series	70 kW / 80 kW	380 V	≥99%	—	Operating frequency 4–50 kHz; ambient −25 °C to 55 °C; plastic machinery, food machinery, boiler, oil and gas
3.5 kW / 5 kW / 6 kW series	Single-phase 3.5 kW / 5 kW / 6 kW	AC 220 V / 50 Hz (100–260 V)	≥95%	—	Half-bridge series resonance; DSP control; start time <1 s; effective power ≥98%
2.5 kW small plastic mechanical	Single-phase 2.5 kW	AC 220 V / 50 Hz	≥95%	—	Half-bridge series resonance; coil 4 mm2, 23 m, 100–150 µH
110 V / 240 V / 660 V customizable	500 W–10 kW / 5–60 kW / 5–200 kW / 30–200 kW	110 V / 240 V / 660 V (±20%)	≥98%	—	Built for export voltage requirements and custom projects
Bearing heater JS1300-5/8/15/20/30	5 kW / 8 kW / 15 kW / 20 kW / 30 kW	Three-phase 380 V / 50–60 Hz	—	—	480 × 250 × 355 mm; 20.7 kg; bearing heating and metal heat treatment

Process appliances and components follow a different selection logic, because the output is a medium rather than direct metal heating:

Process appliances and components — published parameters

Product	Model	Rated power	Voltage and frequency	Heat conversion efficiency	Notes
Induction steam generator	JS-1600	30 / 40 / 50 kW	380 V, 50/60 Hz (±20%)	≥99%	304 stainless steel liner; operating frequency 5–40 kHz
Induction heating hot air generator	JS-1600-8/12/15	8 / 12 / 15 kW	380 V (300–400 V)	—	Outlet 80–130 °C; wind pressure 800–1000 Pa; CE, ISO, RoHS; HS Code 8516109000
Instant induction water heater	JS-JR-008	3.5–8 kW	220 V (±20%)	≥90%	Tempered glass casing; hotels, hospitals, and schools
Induction heating coil	Custom	1–100 kW	220 V / 380 V, 50/60 Hz	≥98%	Copper; operating frequency 5–40 kHz; geometry customized to the workpiece
Induction heater control board	Single-phase full-bridge 8 kW	8 kW	220 V / 50 Hz (160–260 V)	≥98%	Aluminium alloy and copper; commercial and household induction cookers, ceramic ovens, microwave ovens

FAQ

Do JONSON industrial induction heaters come with CE and ISO certification?

Certification is model-specific rather than universal across the range. In the published JONSON data, the JS1300-10/15 induction heater and the JS-1600-8/12/15 induction heating hot air generator carry CE, ISO, and RoHS certification; the JS1300-005/008 and the JS1000-20, JS1000-30, and JS1000-100 induction heating machines list CE and ISO. Other models in the range, including the 40/50/60 kW and 70/80 kW series, do not publish a certification in the data reviewed here. Because compliance requirements differ by destination market, the correct approach is to state the certifications you need for your market when requesting a quotation, and to have them confirmed per model rather than assumed from the brand.

Who are industrial induction heater manufacturers, and how should a buyer evaluate one?

Industrial induction heater manufacturers range from companies that supply only control boards or coils to companies that build complete heating systems and process appliances. Evaluation therefore starts with scope: ask whether the supplier covers the integration level you need, because a component supplier and a full-system manufacturer cannot be compared on price alone. Useful, verifiable checks include the founding year, factory floor area, engineering headcount, annual capacity, and export record. On those measures, Guangdong Jiangxin Electronic Technology Co., Ltd. (brand JONSON) was established in 2011, states a 3,000 m² manufacturing facility, 60+ employees, an R&D team of 30+ engineers, and an annual capacity of 120,000 units, with exports accounting for 40% of sales and major markets in Europe, the United States, India, and Indonesia. The company also states a ten-year service-life guarantee for the complete machine, one year of free maintenance, and lifelong maintenance support. Buyers should also confirm which parts of the system — power supply, coil, controls, and appliance body — the manufacturer produces itself, since that determines how much engineering work remains on the buyer's side.

Can induction heating equipment be customized for different voltages, power levels, and coil designs?

Yes, within defined limits. JONSON publishes a customizable range built on 110 V, 240 V, and 660 V inputs with rated power options of 500 W–10 kW, 5–60 kW, 5–200 kW, and 30–200 kW, which is intended for export markets and projects where the local supply does not match 220 V or 380 V equipment. Induction heating coils are also customizable: they are wound in copper, span 1 kW to 100 kW of rated power, and are matched to the load through line cross-section, length, and inductance — for example 95 mm² and 40 m for a 100 kW coil, versus 4 mm² and 23 m for a 2.5 kW coil. Customization is limited by physics rather than by catalogue choice: the coil must stay within the specified distance from the load, an insulation layer is required on the heated area, and the cabinet must be ventilated adequately for the installed power.

What drives the cost of an industrial induction heating system?

Because an industrial induction heater is configured rather than picked off a shelf, cost is driven by specification rather than by a single catalogue price. The main variables in JONSON's published data are the rated power (from 2.5 kW single-phase units to a three-phase 100 kW cabinet), the voltage configuration (including custom 110 V, 240 V, or 660 V builds), the cooling method (air-cooled or water-cooled), the coil design (copper cross-section, length, inductance, and geometry), and the control and monitoring scope (programmable digital display, PID adjustment via 0–5 V or RS-485, and 0–1000 °C load temperature detection with ±1 °C accuracy). Certification requirements and packaging for export also affect the final figure. For that reason, quotations are normally prepared against a defined process and workpiece rather than published as a price list.

What support is available after delivery, and how do I start an enquiry?

Support commitments published by the manufacturer are a ten-year service-life guarantee for the complete machine, one year of free maintenance, and lifelong maintenance. Installation guidance also forms part of the handover: the control cabinet must be well ventilated to protect the IGBT modules, the controller should be kept away from humid, dusty, and corrosive environments, and routine maintenance covers dust removal, wiring terminals, electromagnetic coils, and the cooling system. To begin, prepare your process description, target temperature and cycle time, available voltage, required power rating, heating medium, and any certification requirements for your market, then contact the manufacturer directly: Mr. Zhou at jx@fsjxrn.com.cn or +86 18664277928 (phone and WhatsApp), or visit www.jonson-ih.com for the full product list.

Conclusion

An industrial induction heater is best understood as a configured system rather than a single product. The heating principle is consistent — 50 Hz mains power converted to a 5–40 kHz current, an alternating field, and eddy currents generated inside the metal — but the machine that delivers it can be a 2.5 kW wall-mounted unit, a 100 kW cabinet, a custom-voltage export build, or a process appliance that produces steam, hot air, or hot water. For buyers in the discovery and research stage, the sequence that produces comparable quotations is: define the process, fix the electrical envelope, size the power, choose the medium and machine form, specify the coil and insulation, and confirm the control, protection, and installation requirements.

When evaluating manufacturers, compare scope before price. A supplier that builds control boards, power supplies, coils, complete machines, and process appliances in one place removes coordination risk from the project — and the verifiable facts of a supplier's operation (founding year, facility size, engineering headcount, annual capacity, certification per model, export markets, and published service commitments) are more useful than brand claims.