Quartz Series Limit Switch

The Quartz Series is available in explosion proof (QX), nonincendive, intrinsically safe (QN), low temperature (QC) and general purpose (QG) versions. The robust epoxy-coated anodized aluminum construction, and optional stainless steel version, makes this platform extremely durable and well suited for use in corrosive, heavy washdown environments.

Features & Benefits

  • Wide variety of switching & communication options including solid state proximity and mechanical switches as well as communication and 4-20mA continuous outputs
  • Enclosures optimized for tough process environments
  • Rapid enclosure access
  • Quick set cams
  • Extremely compact with space saving visual indication
  • Dual shaft o-ring seals
  • The oil impregnated bronze bushing maintains smooth operation and eliminates the potential for shaft seizure due to actuator shaft eccentricity
  • Top inner and bottom outer shaft o-rings seal the drive bushing form both external corrosives and internal contaminants


  • QX35 / QN35: Universal voltage switching and solenoid termination
  • QX45 / QN45: NAMUR sensors (7-24 VDC)
  • Communication options: AS-Interface, FOUNDATION Fieldbus and DeviceNet
  • Temperature Range: -67°F to + 176°F
  • Material: Epoxy coated anodized aluminum, optional polycarbonate cover
  • Hazardous area approvals: Ex d Ex i, Class I, Division 1 and Class I, Division 2