Real-time monitoring of valve status, standard NAMUR installation interface, makes your installation easier and faster.
Valve Limit Switch box Manufacturer
Hearken Valve Monitor
- Body Material: Die Cast Aluminum Alloy, polyester coated
- Shaft Material: Stainless Steel
- Reliable position signaling
- Easy installation
- Clear visual indication
- Color customization
- Wide Temperature Range: -20°C ~ +70°C
- Explosion – Proof
- Enclosure: Weather proof IP67
High-Precision Signal Feedback
Hearken limit switches provide you with different switch options, providing you with high-precision and reliable signal feedback, including mechanical switches, PNP proximity switches, gold-plated contact switches, and inductive switches. At the same time, Hearken limit switches support common output methods, including dry contact signals, 4~20mA, 24V DC, etc., flexibly adapting to your different working conditions.
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Your Professional Valve Position Monitor Supplier In China
The Hearken mechanical limit switch with a clearly visible 3D indication window enables maintenance personnel to confirm the project status at different angles.
Valve Limit Switch Box by Non – Explosion – Proof
APL-210N Limit Switch Box Plastic
Designed for budget-conscious pipeline control, the new Engineering Plastic APL-210N Limit Switch Box delivers highly reliable valve position feedback at an unbeatable price point, making it the ultimate cost-effective solution for large-scale automation projects.
APL-210N Aluminum Material Actuator Limit Switch Box
A proven staple in industrial fluid control, the Die-Cast Aluminum APL-210N Limit Switch Box offers superior mechanical impact resistance and robust protection, engineered for long-term, trouble-free operation in demanding environments.
ITS-100 Position Monitoring Switch
Engineered for tight spaces, the compact ITS-100 delivers a space-saving valve monitoring solution. Featuring a mini aluminum enclosure with captive bolts and NEMA 4X protection, it ensures SIL 3 and ATEX-certified safety.
APL-310N Valve Switch Box
Built for demanding SIS applications, the heavy-duty APL-310N limit switch box features a rugged aluminum enclosure with NEMA 4X protection and captive cover bolts. This SIL 3 and ATEX-certified monitor withstands harsh physical environments.
APL230 Position Monitoring Switch
APL230 Explosion-proof pneumatic valve monitor is tough and compact, with a die-cast aluminum alloy body, coated in powder. This valve monitor follows the NAMUR standard and the protection level is IP67.
Valve Limit Switch Box by Explosion – Proof
APL-510N Position Monitoring Switch
Hearken limit switches are certified for explosion-proof use, such as EEx d IIC T6, EEx ia IIC T6, and EEx d IIB T6, allowing you to use them in hazardous environments with peace of mind.
ITS-300 Explosion Proof Limit Switch Box
Engineered for volatile environments, the heavy-duty ITS-300 features Ex db IIC explosion-proof performance, 14-point terminals, and -40°C readiness. This SIL 3 and ATEX-certified monitor ensures uncompromising safety in severe applications.
APL-910N Stainless Steel Limit Switch Box
HVM-9 Explosion-Proof pneumatic valve monitor is built for valves and actuators in different environments, with a die-cast aluminum alloy shell, power-coated,also with space-saving design. The valve monitor meets the NAMUR standard and the protection level is IP67.
Why Choose Hearken Valve Limit Switch Box?
High Signal Compatibility
The Hearken limit switch supports dry contact, 4~20mA, Modbus, PNP/NPN and other types of industrial signal output, so that you are no longer restricted by signal compatibility in system upgrades. It can seamlessly connect to various industrial automation control systems including PLC and DCS, without adding converters or wiring to increase the burden on your automation system, reducing the difficulty of integration.
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Strong Visibility
Hearken limit switch box uses a 360° visible transparent three-dimensional window indicator window. The indicator signal is brightly colored, allowing you to clearly identify it from different angles even at a long distance, improving the maintenance efficiency of your automation system.
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Sturdy and Durable
Hearken limit switch box uses a high-strength industrial-grade aluminum die-cast housing, and the surface is covered with an electrostatic polyester powder coating to effectively improve corrosion resistance and impact resistance. In addition, the high-level protection Hearken limit switch has passed a number of industry certifications, including RoHS/IEC, SIL3, Ex d II B T6 Gb and other explosion-proof certifications ensure stable operation in harsh environments, extend service life, and minimize your project maintenance costs.
Production
Limit Switch Production Process
Raw Material Testing
Each raw material of the valve position indicator limit switch box will undergo material composition analysis, hardness testing, flame retardancy testing, etc. to ensure the quality of the raw materials.
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Key Component Processing
The tested raw materials will be stamped and the contact plating process will be carried out. The Hearken parts will be subjected to a series of tests including dimensional accuracy testing, resistance value testing, adhesion, conductivity testing, etc.
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Complete Assembly Test
All components of the limit switch, including springs, contacts, terminals, housings, etc., are precisely assembled to ensure contact pressure, rebound force, etc., and electrical performance testing and environmental testing are carried out after assembly to ensure that the Hearken limit switch can still operate stably under harsh working conditions.
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Customization
The Hearken limit switches can be customized according to the requirements of customers. For example, we can provide different colors of appearance and different materials of brackets. There are also many different options for cable entry and switches to meet the various needs of customers.
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Hearken Provides you with Customized Options
Optional Colors
Hearken provides you with different color options for limit switch boxes, including red, green, blue, yellow, silver, etc., which is convenient for you to cope with different working conditions and scenarios, quickly identify the status of the equipment, and improve brand consistency.
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Optional Micro Switches
Hearken limit switches can be equipped with micro switches from brands such as Omron and Honeywell, providing higher sensitivity, stronger signal stability and longer service life, helping you achieve stable and reliable operation of the system under harsh working conditions.
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Your Professional Valve Limit Switch box Manufacturer In China
Hearken limit switch is easy to debug, and the Quick-set Cam design allows you to quickly locate the preset position, avoiding repeated corrections and reducing errors.
Applications of Valve Limit Switch Box
FAQ
A: It provides visual and electrical feedback to confirm if the valve is fully Open or Closed.
A: Connect the Common (COM) and Signal (NO/NC) terminals to your PLC’s input module.
A: Yes, most modern boxes mount directly to NAMUR actuators without needing extra brackets.
A: Yes, but you will need a special ISO 5211 bracket to connect it to the manual handle stem.
A: IP65 or IP67 is recommended to protect against rain, dust, and washdowns.