CST516 Thermocouple-Type Atmospheric Corrosion Monitor

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CST516 Thermocouple-Type Atmospheric Corrosion Monitor

Product ID：FDfs028

Price: Please inquire PDF Format

Supply Ability:50 SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberCST516

Brand NameWHKEPU

Payment TermsTT，PAYPAL，Alibaba.com Pay

CST516 Thermocouple-Type Atmospheric Corrosion Monitor

Product Introduction
The CST516 Thermocouple-Type Atmospheric Corrosion Monitor is an advanced atmospheric corrosion monitoring system based on the galvanic current principle of dissimilar metal couples. It is designed to monitor galvanic current and potential differences under thin liquid films formed on metal surfaces, helping users evaluate surface condensation duration and atmospheric corrosion severity.
The instrument can simultaneously measure 8 channels of potential signals, 8 channels of galvanic current signals, and environmental temperature, humidity and atmospheric pressure. With mV-level potential measurement and pA-level current resolution, the CST516 provides reliable evaluation of galvanic corrosion tendencies between different metallic materials.
It is especially suitable for environmental corrosion monitoring in refineries, power transmission towers, chemical plants, paper mills, control rooms, computer rooms, museums and clean rooms.

Key Features
• 8-channel simultaneous corrosion monitoring
• Measures galvanic current and galvanic potential
• Automatic current range switching from ±1 nA to ±10 mA
• High-resolution current measurement down to 10 pA
• Potential measurement range of −1.20 V to +1.20 V
• Supports Cu-Fe, Zn-Fe and Al-Fe electrode combinations
• User-customizable electrode materials available
• Symmetrical comb-shaped electrode design
• Built-in second-order low-pass filter for high-frequency noise suppression
• High-reliability STM32 microcontroller control
• Integrated temperature, humidity and atmospheric pressure monitoring
• RS485 communication with standard Modbus protocol
• Supports PLC integration and remote monitoring networks
• Communication distance up to 1000 m
• Internal data storage for up to 20,000 groups
• IP65 protection rating for industrial environments

Working Principle
The CST516 atmospheric corrosion monitor uses the electrochemical principle of dissimilar metal galvanic couples. When moisture or a thin electrolyte film forms on the surface of two different metals, an electrochemical reaction may occur between them.
The system continuously monitors:
• Galvanic current — indicating the intensity of electrochemical corrosion activity
• Potential difference — indicating electrochemical corrosion tendency
• Signal fluctuations — helping identify condensation events and surface wetness duration
• Temperature and humidity — providing environmental conditions related to corrosion
• Atmospheric pressure — supporting comprehensive environmental monitoring
The monitored current and potential data can be used to evaluate the severity and tendency of atmospheric corrosion in different environments.
The built-in precision current measurement system automatically selects the appropriate measurement range, ensuring high sensitivity from extremely low corrosion currents to higher galvanic current levels.

Technical Specifications

Parameter	Specification
Product Model	CST516
Probe Electrode Materials	Cu-Fe, Zn-Fe, Al-Fe, customizable
Electrode Type	Symmetrical comb-shaped electrode
Electrode Spacing	0.5 mm
Number of Channels	8 channels
ACM Current Measurement Range	±0.01 nA to ±10 mA
Current Ranges	±1 nA, ±10 nA, ±100 nA, ±1 µA, ±10 µA, ±100 µA, ±1 mA, ±10 mA
Current Range Switching	Automatic
Current Resolution	10 pA @ 10 nA range
Current Measurement Accuracy	0.5% of full scale
Galvanic Potential Range	−1.20 V to +1.20 V
Galvanic Potential Accuracy	±1 mV
Sampling Rate	1–99 seconds
Temperature Range	−30 to +60°C
Temperature Accuracy	±1°C
Humidity Range	0–100% RH
Humidity Accuracy	±3%
Atmospheric Pressure Range	500–1200 hPa
Atmospheric Pressure Accuracy	±0.5 hPa
Data Storage	2 MB, up to 20,000 groups
RTC Clock Error	<1 minute/month
Timed Measurement Interval	1–24 hours
Communication	RS485
Communication Protocol	Standard Modbus
Maximum Communication Distance	Up to 1000 m
Power Supply	DC 12 V
Dimensions	180 × 130 × 60 mm
Weight	600 g
Operating Temperature	−30 to +60°C
Operating Humidity	≤80%
Enclosure Material	Plastic
Protection Rating	IP65

Applications
The CST516 atmospheric corrosion monitoring instrument is suitable for:
• Oil refineries and petrochemical facilities
• Power transmission towers and substations
• Chemical plants
• Paper and pulp mills
• Industrial control rooms
• Computer rooms and data centers
• Museums and archives
• Clean rooms
• Laboratories
• Electronic equipment environments
• Industrial environmental monitoring systems
• Atmospheric corrosion research
• Multi-metal corrosion evaluation

CST516 vs Conventional Environmental Monitoring Systems

Feature	CST516 Atmospheric Corrosion Monitor	Conventional Environmental Monitor
Corrosion Monitoring	Direct galvanic current and potential measurement	Usually indirect evaluation
Current Resolution	Up to 10 pA	Typically lower sensitivity
Corrosion Channels	8 channels	Often single or fewer channels
Automatic Current Range	Yes	Often manual or limited
Electrode Materials	Cu-Fe, Zn-Fe, Al-Fe, customizable	Usually limited
Condensation Detection	Supported through electrochemical signal changes	Usually requires separate sensors
Environmental Parameters	Temperature, humidity and pressure	Varies by model
Communication	RS485 + Modbus	May have limited integration
PLC Integration	Supported	Not always available
Remote Monitoring	Supported through communication networks	Limited or optional
Data Storage	Up to 20,000 groups	Often dependent on external devices

Compared with conventional environmental monitoring instruments that mainly measure temperature and humidity, the CST516 atmospheric corrosion monitor provides direct electrochemical corrosion information through galvanic current and potential measurement. This makes it more suitable for evaluating actual atmospheric corrosion activity and condensation-related corrosion risks.

Frequently Asked Questions (FAQ)
1. What is the CST516 used for?
The CST516 is used for monitoring atmospheric corrosion by measuring galvanic current and potential differences generated between dissimilar metal electrodes under thin moisture films.
2. How many channels does the CST516 support?
The instrument supports 8 independent corrosion monitoring channels and can simultaneously collect multiple galvanic current and potential signals.
3. What electrode materials are available?
Standard electrode material combinations include Cu-Fe, Zn-Fe and Al-Fe. Customized electrode materials can also be supported according to application requirements.
4. Can the CST516 detect condensation?
Yes. Changes in galvanic current and potential can indicate the formation and duration of thin moisture films or condensation on the monitored surface.
5. What is the current measurement resolution?
The CST516 provides a current resolution of up to 10 pA at the 10 nA measurement range, enabling highly sensitive atmospheric corrosion monitoring.
6. Does the instrument support automatic range switching?
Yes. The ACM current measurement system automatically switches between multiple ranges from ±1 nA to ±10 mA.
7. Can the CST516 be connected to a PLC system?
Yes. The instrument uses RS485 communication with the standard Modbus protocol, allowing convenient integration with PLC and industrial automation networks.
8. Can the instrument be used for remote monitoring?
Yes. Through RS485 communication and compatible communication equipment such as wireless serial servers, the CST516 can be integrated into remote corrosion monitoring networks.
9. What environments are suitable for the CST516?
The CST516 is suitable for industrial, commercial and controlled environments including refineries, power facilities, chemical plants, computer rooms, museums, clean rooms and other locations where atmospheric corrosion monitoring is required.

Frequently Asked Questions (FAQ)
1. What is the CST516 used for?
The CST516 is used for monitoring atmospheric corrosion by measuring galvanic current and potential differences generated between dissimilar metal electrodes under thin moisture films.
2. How many channels does the CST516 support?
The instrument supports 8 independent corrosion monitoring channels and can simultaneously collect multiple galvanic current and potential signals.
3. What electrode materials are available?
Standard electrode material combinations include Cu-Fe, Zn-Fe and Al-Fe. Customized electrode materials can also be supported according to application requirements.
4. Can the CST516 detect condensation?
Yes. Changes in galvanic current and potential can indicate the formation and duration of thin moisture films or condensation on the monitored surface.
5. What is the current measurement resolution?
The CST516 provides a current resolution of up to 10 pA at the 10 nA measurement range, enabling highly sensitive atmospheric corrosion monitoring.
6. Does the instrument support automatic range switching?
Yes. The ACM current measurement system automatically switches between multiple ranges from ±1 nA to ±10 mA.
7. Can the CST516 be connected to a PLC system?
Yes. The instrument uses RS485 communication with the standard Modbus protocol, allowing convenient integration with PLC and industrial automation networks.
8. Can the instrument be used for remote monitoring?
Yes. Through RS485 communication and compatible communication equipment such as wireless serial servers, the CST516 can be integrated into remote corrosion monitoring networks.
9. What environments are suitable for the CST516?
The CST516 is suitable for industrial, commercial and controlled environments including refineries, power facilities, chemical plants, computer rooms, museums, clean rooms and other locations where atmospheric corrosion monitoring is required.