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YFR infrared thermometers are non-contact temperature sensors designed for infrared heating systems, industrial dryers, curing ovens, coating lines, printing dryers, thermoforming machines, and process temperature monitoring applications.
In an infrared heating system, temperature feedback is important for stable process control. The infrared thermometer measures the surface temperature of the target material without direct contact, then sends a signal to the controller or PLC. This helps the heating system adjust lamp power, reduce overheating risk, and improve repeatability in production.
YFR can supply infrared temperature sensors for different temperature ranges, output signals, installation distances, and control requirements.
| Feature | Description |
|---|---|
| Product Type | Infrared thermometer / infrared temperature sensor |
| Measurement Type | Non-contact surface temperature measurement |
| Temperature Range | 0–100℃, 200℃, 300℃, 500℃, up to 1200℃ options |
| Accuracy | ±1% or ±1℃ depending on model and conditions |
| Repeatability | ±1% or ±1℃ depending on model and conditions |
| Signal Output | 4–20mA or RS485 optional |
| Supply Voltage | 9–30VDC |
| Distance-to-Spot Ratio | 20:1 option |
| Emissivity | 0.95 standard option |
| Response Wavelength | 8–14μm |
| Ambient Temperature | 0–60℃ |
| Storage Temperature | -20–80℃ |
| Relative Humidity | 10–90% RH |
| Housing Material | Stainless steel |
| Protection | IP65 |
| Installation Accessory | Mounting bracket available |
Infrared lamps can respond quickly to power changes. Without temperature feedback, the heating result may be affected by line speed, material color, coating thickness, distance, airflow, and product size. A non-contact infrared thermometer allows the system to monitor the target surface temperature continuously.
When connected to a PID controller, PLC, or SCR power regulator, the sensor can help build a closed-loop control system. This is useful for applications where the process must stay within a stable temperature window, such as coating curing, ink drying, plastic thermoforming, adhesive activation, film heating, textile drying, and glass processing.
| Advantage | Practical Benefit |
|---|---|
| Non-contact measurement | Suitable for moving webs, sheets, coated parts, and hot surfaces |
| Fast temperature feedback | Helps the control system adjust heating output in real time |
| 4–20mA output option | Easy connection with industrial controllers and control cabinets |
| RS485 output option | Suitable for digital monitoring and PLC integration |
| IP65 stainless steel housing | Suitable for many industrial environments |
| 20:1 distance-to-spot option | Helps measure target areas at practical installation distances |
| Multiple temperature ranges | Selection available according to process requirements |
| Works with IR systems | Suitable for infrared lamps, modules, ovens, dryers, and curing lines |
| Application | Typical Use |
|---|---|
| Infrared drying ovens | Surface temperature monitoring for drying and curing processes |
| Printing dryers | Temperature feedback for paper, film, labels, ink, and coating drying |
| Paint and coating lines | Control of surface temperature during preheating and curing |
| Thermoforming machines | Plastic sheet temperature monitoring before forming |
| Packaging machines | Film heating, sealing, shrinking, and laminating temperature feedback |
| Textile drying | Fabric surface temperature monitoring in IR drying systems |
| Glass processing | Temperature monitoring during edge heating, preheating, or coating drying |
| Laboratory and test systems | Non-contact measurement for IR heating process development |
The infrared thermometer can be integrated into a complete infrared heating control system. Typical system architecture includes:
Infrared lamps or heating modules.
SCR power regulator or thyristor power controller.
PID temperature controller or PLC.
Infrared thermometer for temperature feedback.
HMI display or temperature monitoring panel.
Alarm output and safety protection if required.
For multi-zone infrared ovens or drying tunnels, each heating zone can use one or more infrared temperature sensors. This allows separate temperature monitoring and independent power adjustment for different process zones.
| Output Type | Typical Use |
|---|---|
| 4–20mA | Standard analog output for PID controllers, PLC analog input modules, and temperature control cabinets |
| RS485 | Digital communication for PLC, monitoring systems, and multi-sensor applications |
Before ordering, confirm the required signal type according to your controller, PLC, or control cabinet design.
To select the correct infrared thermometer, please confirm the following information:
| Required Information | Example |
|---|---|
| Target temperature range | 0–300℃, 0–500℃, or up to 1200℃ |
| Target material | Metal, plastic, paper, coating, glass, textile, film |
| Surface condition | Matte, glossy, coated, wet, dry, reflective |
| Measurement distance | Distance from sensor to target surface |
| Target spot size | Required measurement area |
| Output signal | 4–20mA or RS485 |
| Control system | PID controller, PLC, HMI, or temperature control cabinet |
| Installation environment | Oven, drying line, open machine, dusty area, humid area |
| Response requirement | Continuous monitoring or fast process feedback |
| Mounting requirement | Bracket, fixed holder, or custom installation |
Infrared thermometers measure surface temperature based on infrared radiation. Measurement accuracy can be affected by emissivity, surface reflectivity, viewing angle, steam, dust, smoke, protective glass, and distance-to-spot ratio.
For stable measurement, the sensor should be installed with a clear view of the target surface. The measured spot should be smaller than the actual target area. For reflective materials such as shiny metal or glass, emissivity setting and installation angle should be evaluated carefully.
If the sensor is used in a high-temperature, dusty, or enclosed oven environment, cooling protection, air purge, or a protective mounting structure may be required.
YFR can help configure infrared thermometers as part of a complete infrared heating system. We can support infrared lamps, heating modules, power controllers, temperature controllers, sensors, and control cabinets.
| Requirement | Available Support |
|---|---|
| Single sensor | Infrared thermometer for one measurement point |
| Multi-zone system | Multiple sensors for different heating zones |
| Analog control | 4–20mA signal for PID or PLC analog input |
| Digital monitoring | RS485 output for PLC or monitoring system |
| Control cabinet | Integration with power regulator and temperature controller |
| Heating project | Sensor selection together with IR lamps and heating module design |
It is used to measure the target surface temperature without contact and provide feedback to the controller or PLC. This helps the heating system adjust power and maintain stable process temperature.
Yes. Models with 4–20mA or RS485 output can be selected for PLC connection, depending on the control system design.
The page lists options such as 0–100℃, 200℃, 300℃, 500℃, and up to 1200℃. The correct range should be selected according to the actual process temperature.
A 20:1 ratio means the measurement spot size changes with distance. For example, at a longer distance, the sensor measures a larger target area. The target should always be larger than the measurement spot for accurate readings.
Yes. Non-contact infrared thermometers are suitable for moving webs, sheets, films, coated parts, and other materials in continuous heating and drying systems.
It can be used, but reflective surfaces may require careful emissivity adjustment, installation angle control, or process testing. Shiny metal and glass surfaces are more difficult to measure accurately than matte surfaces.
This infrared thermometer will perfectly suit our infrared heating and control system
