ST202 Small Target Infrared Thermometer

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ST202 Small Target Infrared Thermometer

Product ID：CLWDhwcw023

Price: Please inquire PDF Format

Supply Ability:50SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberST202

Brand NameSXRUIGUANG

Payment TermsTT，PAYPAL，Alibaba.com Pay

ST202 Small Target Infrared Thermometer

Product Introduction
The ST202 Small Target Infrared Thermometer is a high-performance online infrared temperature measurement instrument designed for fast, accurate and real-time non-contact measurement of medium- and high-temperature objects.
The ST202 series integrates a precision optical system, photoelectric sensor, signal processing circuit, microcomputer, digital display and data output functions. It provides reliable temperature measurement for industrial processes where direct contact measurement is difficult or unsuitable.
The ST202 series includes three models:
• ST202-A: 600°C to 1800°C
• ST202-B: 800°C to 2500°C
• ST202-C: 1000°C to 3000°C
Operating at a 1.0 μm spectral response, the ST202 infrared thermometer offers high accuracy, fast response and excellent small-target measurement capability. With a 400:1 distance coefficient, it can accurately measure targets as small as 2 mm, making it suitable for demanding industrial temperature monitoring applications.

Model Selection

Model	Measuring Range	Spectral Response	Sighting System	Distance Coefficient
ST202-A	600–1800°C	1.0 μm	Coaxial Telescope	400:1
ST202-B	800–2500°C	1.0 μm	Coaxial Telescope	400:1
ST202-C	1000–3000°C	1.0 μm	Coaxial Telescope	400:1

Key Features
• Wide temperature measurement range from 600°C to 3000°C
• High measurement accuracy of ±0.5% FS
• Large 400:1 distance coefficient
• Small target measurement capability down to 2 mm
• Fast response time of ≤50 ms, with a minimum of 20 ms
• Three temperature measurement modes: TEM, MAX and AVG
• Adjustable emissivity from 0.10 to 1.00
• High-brightness LED display for industrial environments
• Coaxial telescope sighting for clear and intuitive target alignment
• 4–20 mA analog output for direct connection to displays and PLC systems
• Isolated RS485 digital output for industrial networking
• Up to 32 infrared thermometers can be connected to one RS485 network
• Communication protocol and demonstration software available for secondary development
• IP65 protection rating for reliable industrial use
• Supports air cooling, water cooling and thermal protective accessories

Working Principle
The ST202 Small Target Infrared Thermometer operates based on the principle of non-contact infrared radiation measurement.
All objects above absolute zero emit thermal radiation. The precision optical system collects the infrared energy emitted by the target and focuses it onto a high-performance photoelectric sensor.
The sensor converts the received infrared radiation into an electrical signal. The signal is then processed by the internal signal processing circuit and microcomputer. Based on the measured radiation intensity and the selected emissivity value, the system calculates the actual surface temperature of the target.
The temperature result is displayed on the instrument and can also be transmitted through 4–20 mA analog output or isolated RS485 digital communication for remote monitoring and industrial automation.

Technical Parameters

Parameter	ST202-A	ST202-B	ST202-C
Measuring Range	600–1800°C	800–2500°C	1000–3000°C
Spectral Response	1.0 μm	1.0 μm	1.0 μm
Response Time	≤50 ms, fastest up to 20 ms	≤50 ms, fastest up to 20 ms	≤50 ms, fastest up to 20 ms
Measuring Accuracy	±0.5% FS	±0.5% FS	±0.5% FS
Repeatability	±0.3% FS or ±1°C	±0.3% FS or ±1°C	±0.3% FS or ±1°C
Sighting System	Coaxial telescope sighting	Coaxial telescope sighting	Coaxial telescope sighting
Emissivity	0.10–1.00 adjustable, step 0.01	0.10–1.00 adjustable, step 0.01	0.10–1.00 adjustable, step 0.01
Resolution	1°C	1°C	1°C
Distance Coefficient	400:1	400:1	400:1
Minimum Target Size	2 mm	2 mm	2 mm
Time Interval	1–30 s, step 1 s	1–30 s, step 1 s	1–30 s, step 1 s
Temperature Modes	TEM / MAX / AVG	TEM / MAX / AVG	TEM / MAX / AVG
Analog Output	4–20 mA	4–20 mA	4–20 mA
Digital Output	Isolated RS485	Isolated RS485	Isolated RS485
Protection Rating	IP65	IP65	IP65
Ambient Temperature	-10°C to 60°C	-10°C to 60°C	-10°C to 60°C
With Air Cooling	Up to 100°C	Up to 100°C	Up to 100°C
With Water Cooling	Up to 150°C	Up to 150°C	Up to 150°C
With Thermal Protective Sleeve	Up to 200°C	Up to 200°C	Up to 200°C
Storage Temperature	-20°C to 80°C	-20°C to 80°C	-20°C to 80°C
Instrument Size	Length 167 mm × Diameter Φ50 mm	Length 167 mm × Diameter Φ50 mm	Length 167 mm × Diameter Φ50 mm
Weight	0.4 kg	0.4 kg	0.4 kg
Power Supply	24 VDC, ±10%, 100 mA	24 VDC, ±10%, 100 mA	24 VDC, ±10%, 100 mA

Small Target Measurement Capability
The ST202 series is specially designed for small and distant high-temperature targets. With a distance coefficient of 400:1, the instrument provides accurate temperature measurement over a long working distance.
Its optical system enables precise temperature measurement of targets as small as 2 mm, making it particularly suitable for applications where conventional infrared thermometers cannot accurately isolate small measurement areas.
This capability is valuable for:
• Small metal components
• Thin wires and rods
• Heating elements
• Small furnace targets
• Precision thermal processing
• High-temperature moving objects

Output and Industrial Communication
The ST202 online infrared thermometer provides flexible industrial output options.
4–20 mA Analog Output
The standard 4–20 mA output allows direct connection with:
• PLC systems
• Digital indicators
• LED large-screen displays
• Data acquisition systems
• Industrial control systems
RS485 Digital Communication
The isolated RS485 output supports networked temperature monitoring. Up to 32 ST202 infrared thermometers can be connected within one communication network.
Communication protocol and demonstration software are available to support system integration and secondary development.

Application Scenarios
The ST202 Small Target Infrared Thermometer is suitable for non-contact temperature measurement in:
• Steel and metallurgy
• Heat treatment processes
• Metal forging
• Metal casting
• Industrial furnaces
• Ceramic production
• Glass processing
• Semiconductor manufacturing
• High-temperature material processing
• Heating element monitoring
• Small component temperature measurement
• Automated production lines
• Industrial process control

ST202 vs Conventional Infrared Thermometer

Feature	ST202 Small Target Infrared Thermometer	Conventional Infrared Thermometer
Temperature Range	600–3000°C	Usually lower or application-dependent
Small Target Measurement	Down to 2 mm	Usually larger target required
Distance Coefficient	400:1	Usually lower
Accuracy	±0.5% FS	Often lower
Response Speed	Fastest 20 ms	Usually slower
Sighting Method	Coaxial telescope	Laser or basic optical aiming
Measurement Modes	TEM / MAX / AVG	Usually limited
Analog Output	4–20 mA	Not always available
Digital Communication	Isolated RS485	Often optional or unavailable
Network Capability	Up to 32 instruments	Usually limited
Industrial Protection	IP65	Application-dependent
Cooling Accessories	Air, water and thermal protection	Limited options

Why Choose ST202?
The ST202 Small Target Infrared Thermometer combines high-temperature measurement capability, fast response, high accuracy and advanced small-target optical performance in a compact industrial design.
Its 600–3000°C measurement range, 400:1 distance coefficient, 2 mm small-target capability and 20 ms fast response make it an effective solution for demanding high-temperature industrial applications.
With 4–20 mA and RS485 outputs, the ST202 can be easily integrated into automated production lines, PLC systems and industrial monitoring networks.

FAQ
1. What is the ST202 Small Target Infrared Thermometer used for?
It is used for non-contact measurement of medium- and high-temperature objects, especially small targets and high-temperature industrial processes.
2. What temperature range does the ST202 series cover?
The ST202 series covers a total range from 600°C to 3000°C, depending on the selected model.
3. What are the differences between ST202-A, ST202-B and ST202-C?
ST202-A measures 600–1800°C, ST202-B measures 800–2500°C, and ST202-C measures 1000–3000°C.
4. What is the smallest target the ST202 can measure?
The ST202 series can accurately measure targets as small as 2 mm under suitable measurement conditions.
5. What is the distance coefficient?
The distance coefficient is 400:1, allowing accurate measurement of small targets from longer distances.
6. How fast is the ST202 response time?
The response time is ≤50 ms, with the fastest response reaching 20 ms.
7. Does the ST202 support PLC connection?
Yes. The standard 4–20 mA output allows direct connection with PLC systems and other industrial control equipment.
8. Can multiple instruments be connected to one network?
Yes. The isolated RS485 interface supports networking of up to 32 infrared thermometers.
9. Is the ST202 suitable for harsh industrial environments?
Yes. The instrument has an IP65 protection rating and can be used with air cooling, water cooling or a thermal protective sleeve for high-temperature environments.

FAQ
1. What is the ST202 Small Target Infrared Thermometer used for?
It is used for non-contact measurement of medium- and high-temperature objects, especially small targets and high-temperature industrial processes.
2. What temperature range does the ST202 series cover?
The ST202 series covers a total range from 600°C to 3000°C, depending on the selected model.
3. What are the differences between ST202-A, ST202-B and ST202-C?
ST202-A measures 600–1800°C, ST202-B measures 800–2500°C, and ST202-C measures 1000–3000°C.
4. What is the smallest target the ST202 can measure?
The ST202 series can accurately measure targets as small as 2 mm under suitable measurement conditions.
5. What is the distance coefficient?
The distance coefficient is 400:1, allowing accurate measurement of small targets from longer distances.
6. How fast is the ST202 response time?
The response time is ≤50 ms, with the fastest response reaching 20 ms.
7. Does the ST202 support PLC connection?
Yes. The standard 4–20 mA output allows direct connection with PLC systems and other industrial control equipment.
8. Can multiple instruments be connected to one network?
Yes. The isolated RS485 interface supports networking of up to 32 infrared thermometers.
9. Is the ST202 suitable for harsh industrial environments?
Yes. The instrument has an IP65 protection rating and can be used with air cooling, water cooling or a thermal protective sleeve for high-temperature environments.