Mars Air Systems J0021
Mars Air Systems J0021

Image for reference only and may slightly vary.

Mars Air Systems J0021, Basic Controller w/ Time Delay, Magnetic Commercial Surface-Mounted Reed Switch, 115v

$316.50 /ea

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Mars Air Systems J0021 Overview


  • Compatible with LPV2, LPN2, STD2, N2, QP10 series air curtains
  • Time delay option – Field adjustable (6s-20m) delay on break. Delay keeps air curtains ON after door closes
  • UR (UL Recognized) and rated for NEMA 1 (field installed by others)
  • Solid State Controllers
  • Used when low voltage automatic control of an air curtain(s) is required
  • Compact control package for limited space installations
  • Reed and Magnet have sleek compact design (must be within 3/8” of each other to energize and deenergize the air curtain)
  • Single pole terminal (1P) normally closed (NC) and normally opened (NO) contact
  • Relays require at least one switch to function, and so are available in Control Kits only.
  • Wiring terminals provided in reed switches (field wired by others)
  • Durable white plastic construction

Note: Second switch required for double door. In multiple-door installations, one relay controls multiple switches.

Mars Air Systems Warranty:

1 Year Parts

Since this item is not stocked in our warehouse, we can not guarantee availability, transit times, etc. If you need this item within a certain timeframe, please contact us before placing your order so that we can verify current stocking levels for you.

Product Brand

J0021 Resources

Mars Air Systems J0021 Specifications


Single Phase
Surface Mount
Switch Style
Magnetic Reed
115 Volts
Product Condition

Compatible Products

Models numbers shown are for reference only, may not be listed, may vary by serial number and subject to change without notice. Please contact us to confirm the proper item to be used with your model.

QP10 Series


Manufacturer Warranty
1 Year Parts

Customer Q&A

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