Close this search box.

Limit Switch Box 100 Series Manufacturer

Limit Switch Box 100 Series

Limit Switch Box is a field instrument to detect the valve status in the automatic control system, which is used to switch the opening or closing position of the valve (the signal output of the contact is accepted by the program controller or the computer search sample, and then execute the next procedure after confirmation. The product can also be used as an important valve interlock protection and remote alarm indication in the automatic control system.


The HyM-1 Series Valve Position Monitor is a compact weatherproof enclosure featuring internal adjustable position switches and an external visual indication. It adheres to the NAMUR standard for mounting and drive, making it ideally suited for installation on quarter-turn actuators and valves.

Limit Switch Box 100 Series detail 1 Limit Switch Box 100 Series detail 2 Limit Switch Box 100 Series detail 3


The HVM.1 Series Valve Position Monitor adopts a compact design to offer miniature weatherproof protection in an aluminum die-cast enclosure with O-ring sealing. Its bracket conforms to both ISO 5211 and the NAMUR standard.

Key Features and Characteristics

  • Durable and streamlined design featuring an aluminum die-cast housing coated with polyester powder.
  • Visual position indicator secured with bolt-on mechanism.
  • “Quick-Set” spring-loaded splined cam eliminates the need for additional adjustments after initial setup. Easy adjustment without tools.
  • Dual cable entries provided.
  • Captive cover bolts prevent loss when cover is removed.
  • Stainless steel shaft and bracket adhere to NAMUR standard.
  • Equipped with Omron switches for reliability.

We provide a variety of Limit Switch Boxes, if you have special needs, please get in touch with us directly!

Standard Specification


Product model IST-100 Shell material Die-cast aluminum
Position indication CLOSE-red switch

OPEN-yellow switch

Shell paint Black polyester paint
Cam-type Diamond cam red yellow Micro motion type 2-SPDT mechanical single pole double throw
Micro-movement contact Silver contact micro-movement Terminal block Copper core 8 position terminal
Voltage range Max 250VAC/DC Rated current DC250V 0.3A

See label for details

Protection level IP67 Ambient temperature -20°℃-+60C
Connecting thread 2XG1/2″ (M20*1.5) Bracket style Movable mounting bracket
Optional accessories Waterproof joints and covers Bracket material Carbon steel paint

Related Products

Product Categories

Contact Us Now

Scroll to Top

Contact Us Now

If you would like to have a question then get in touch today, we are ready to assist 24/7.
We welcome your cooperation and we will develop with you.

This website uses cookies to ensure you get the best experience on our website.