LD20/SP20 Industrial Flange Connector Dimensions and Specs
SP21 Connector for Water Quality Monitoring Instruments
The SP21 connector for water quality monitoring instruments is engineered to provide stable electrical connections for environmental monitoring systems. With a robust circular design and secure threaded coupling, it ensures reliable signal and power transmission in demanding industrial and outdoor environments.

Durable SP21 Circular Connector Structure
The SP21 circular connector features a rugged housing and high-quality insulating materials, providing excellent resistance to moisture, dust, and mechanical stress. This makes it suitable for continuous operation in water treatment plants, environmental monitoring stations, and field testing devices.
SP21 Connector for Water Quality Sensor Systems
This SP21 connector is widely used in water quality analyzers, pH meters, dissolved oxygen meters, turbidity meters, and other monitoring instruments. It ensures stable connectivity between sensors, controllers, and data acquisition equipment.
Reliable SP21 Connector for Harsh Environments
With secure locking and strong sealing performance, the SP21 connector maintains reliable connections even in humid or outdoor conditions. It is an ideal solution for water monitoring systems requiring durability and consistent signal transmission.
Selection Considerations for the SP21 Connector
When selecting the SP21 connector for your water quality monitoring application, consider the following decision points:
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Pin configuration: Available in 2 to 12 pin options to match your sensor signal and power requirements.
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Gender selection: Choose male or female versions based on your cable and panel mounting needs.
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Material compatibility: PC/PA66 housing with gold-plated brass contacts supports corrosion resistance in humid environments.
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Application environment: Verify that the connector's sealing performance meets your specific moisture and dust exposure conditions.
Suitable and Unsuitable Applications
The SP21 connector is well suited for water quality analyzers, pH meters, dissolved oxygen meters, turbidity meters, and related field monitoring equipment where stable signal transmission is required. It is not intended for high-voltage power distribution, submersible applications beyond its rated sealing capability, or environments requiring metal-shell shielding unless confirmed with the manufacturer.
Inquiry Checklist for SP21 Connector Orders
To ensure accurate matching and timely delivery, please prepare the following information when contacting our sales team:
- Required pin count and gender (male or female)
- Cable diameter and conductor specifications
- Mounting style: panel mount, cable mount, or flange type
- Operating environment details, including temperature range and moisture exposure
- Any specific mating requirements with existing equipment
For related flange connector options, see LD20/SP20 Industrial Flange Connector Dimensions and Specs. For similar environmental monitoring applications, review SP17 Waterproof Connector for Environmental Monitoring Instruments.
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