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Process Control Instruments

Your Professional Process Control Instruments Supplier

 

Our goal is to become your true partner in the field of process control instruments China. The factory is located in Zhongguancun Overseas Science and Technology Park, Shijiazhuang High-Tech Zone. Adjacent to the R&D center, it has formed an integrated layout of "R&D, production and sales". We have a skilled engineering team dedicated to refining every stage, from product development and process improvement to production oversight, ensuring every product delivered meets rigorous quality and performance standards. The price is competitive and the product is quality-assured, which is a good choice for your long-term cooperation.

 
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Why Choose Us

Quality Control

The company implements the ISO 9001 full-process quality control system. IQC (Initial Quality Control) conducts rigorous sampling inspections of core raw materials; IPQC (Initial Quality Control) uses AOI (Automated Optical Inspection) to detect welding defects and records data in real time; OQC (Outgoing Quality Control) conducts performance and EMC testing, and qualified products are labeled with traceability codes for problem tracing.

Our Certifications

CE Certification (compliant with EU EMC/EMD directives, applicable to the European market), FCC Certification (compliant with US electromagnetic compatibility standards), IEC 60950 Certification (ensuring the safety of information technology equipment), ISO 9001:2015 Quality Management System Certification (standardizing the entire production and operation process), and RoHS Certification (restricting hazardous substances, meeting environmental protection requirements).

Production Equipment

Our company possesses advanced production equipment, such as high-speed pick-and-place machines + automatic solder paste printers, multi-functional calibrators (voltage/current/resistance calibration), oscilloscopes (signal stability testing), and insulation testers (electrical safety testing), temperature and humidity test chambers (-40℃~120℃, 0%RH~100%RH) + high and low voltage impact testers, automated production lines, anti-static workbenches, and AOI inspection machines (SMT soldering defect detection).

 

Our Services

The company has established a 24-hour technical support hotline and online service platform (WeChat, email). For product usage issues, technicians will provide remote guidance within 1 hour (video call, online debugging); for complex faults that cannot be resolved remotely, the company provides on-site service (on-site service within 48 hours in major domestic cities, and international on-site service coordinated by local partners). The company provides a 12-month product warranty (extended to 24 months for long-term customers) and regularly provides post-warranty maintenance reminders to ensure long-term stable product operation.

 

Advantages of Process Control Instruments
1

Enhanced security

Multi-loop controllers can have security features, such as the absence of physical buttons, that limit operator access to critical settings and prevent unauthorized changes.

2

Integration and remote access

They often support communication with other devices and systems via fieldbus options and can be accessed remotely for viewing and control via a network.

3

Smaller footprint

They have a higher loop density, allowing more control loops to fit in a smaller space, which is ideal for compact machinery.

4

Flexibility

Systems can be programmed to allow zones to work independently or in conjunction with each other, depending on the application's needs.

 

Specification of Process Control Instruments

 

Control Cycle

50mS/100mS

Measurement Accuracy

0.1% FS (using 24-bit AD)

Sampling Rate

20Hz/10Hz

Control Output

Analog signals

4-20mA, 0-20mA (<500Ω), 0-10mA (<1kΩ)

Relay

2A (250V AC)

Solid-state relay (transistor)

22V 20mA

Thyristor

6A 250V AC

LED Nixie Tube

3-row display

Row 1 (PV)

5 digits

Row 2 (SV)

5 digits

Row 3 (information window)

3 digits

Signal Measurement Input Impedance

≥500kΩ for voltage signals, ≤120Ω for current signals, ≥500kΩ for thermocouples

Resistance measurement adopts a 3-wire system; The resistance of each signal transmission wire shall not exceed 10Ω

Standard MODBUS RTU communication protocol (2-wire RS485)

Parity check

None, odd, even

Communication speed

4800BPS, 9600BPS, 19200BPS

Communication address range

1~247

Power Supply

86~260V AC (47~63Hz)

Isolation Voltage

2300V AC for 1 minute (isolation between input, output, and power supply)

Model Selection & Dimensions

DK2404T:

External Dimensions: 96×96×109mm

Cutout Dimension: 92×92mm

 

Features of Process Control Instruments

 

Measurement accuracy of Class 0.1, with a 5-digit nixie tube display and a status display window. Standard MODBUS RTU communication protocol, optional Ethernet interface. High-speed master-slave control instrument online communication function, simplifying process curve settings and enabling automatic SV synchronization.

 

Grouped PID and grouped PID limiting, suitable for loads with various characteristics. Functions including remote analog setting, communication control, and heater wire break protection. Supports 32 common industrial signals such as PT1000 input. Adopts an improved DK PID algorithm for more accurate control.

 

Equipped with sensor power supply function and anti-interference design. Enhanced valve position control instrument, supporting both valve position control with feedback and valve position control without feedback. Supports custom 8-point curve input correction, non-standard custom sensors, and automatic switching between high-temperature and low-temperature sen.

24 Segment Curves Industrial Process Controller

 

Applications of Process Control Instruments

Packaging And Manufacturing

Control temperature in specific areas of a packaging machine or assembly line to ensure product quality.


Process And Chemical Control

Monitor and control various process parameters (like temperature, pressure, or flow) in a plant, including systems with 4-20ma inputs and outputs.


Remote i/o Stations

Provide control and data acquisition in hazardous areas where it's not practical or safe to have a full control system.


Pharmaceutical Reactor Utilities

Manage the complex temperature and utility requirements for pharmaceutical reactors.

Hvac and environmental control

Manage temperature and other parameters in multiple zones of a building or a larger air conditioning system to ensure comfort and efficiency.

Industrial ovens and heat treatment

Stabilize temperatures across different zones in ovens used for manufacturing or heat-treating processes.

Other industrial processes

Apply to a wide range of applications, including continuous bottle filling systems, batch mixing systems, and traffic control systems.

 

Components of Process Control Instruments

 

4-Loop On-Off Control Instrument

Sensors

Devices that measure the process variable, such as temperature, pressure, flow, or level. These sensors convert the physical variable into an electrical signal.


Actuators

Devices that take the controller's signal and act on the process to change the manipulated variable. Examples include valves, heaters, or motors, which alter properties to maintain the desired setpoint.


Controller

The central electronic device that compares the setpoint with the measured process variables from the sensors and determines the necessary output. Multi-loop controllers can manage multiple independent control loops simultaneously.


Feedback loop

The closed-loop system relies on feedback, where the measured variable is sent back to the controller to ensure the process variable stays near the setpoint.

 

Packing and Shipping of Process Control Instruments

 

Packing

Box+cushioned packaging

Shipping

Shipped by road, sea, rail

 

FAQ

 

Q: What is a multi-loop on-off controller used for?

A: It is used to independently control multiple temperature, pressure, or process loops with simple on/off control in one compact device.

Q: What is the main advantage of a multi-loop on-off controller?

A: It can manage several control loops simultaneously, saving panel space, reducing wiring, and lowering overall system cost.

Q: What types of inputs and outputs does it support?

A: It typically supports multiple sensor inputs such as thermocouples, rtds, and analog signals, with relay or ssr output options.

Q: In which industries are multi-loop on-off controllers commonly used?

A: They are widely used in plastic machinery, furnaces, hvac systems, food processing, chemical equipment, and industrial automation.

Q: How do I select the right multi-loop on-off controller?

A: Selection depends on the number of control loops, required input types, output capacity, control accuracy, and operating environment.

As one of the leading process control instruments manufacturers and suppliers in China, we warmly welcome you to wholesale high-grade process control instruments made in China here from our factory. All customized products are with high quality and competitive price.

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