Liquid Level Controllers
New Series EVS Pneumatic Liquid Level Controller
Easy-access, back-mounted unit that provides liquid level or interface control for gas separator and scrubber applications. Series EVS controllers feature patented Envirosaveâ„¢ snap (on/off) pilots, which prevent fugitive emissions and reduce bleeding of valuable gases.
  • Back-mount design with flush-mount internals simplifies installation and inspection
  • Envirosave pilot rated at zero leakage in U.S. EPA Natural Gas STAR Program report
  • Uses Norriseal’s force-balance technology, for proven reliability and long service life
  • High sensitivity for either Top Level or Interface control
  • Weather-resistant sealed enclosure
  • Complies with NACE MR0175-2002
Series 1001/1001A/1001XL Pneumatic Liquid Level Controller
Reliable and economical pneumatic liquid level controllers with no-bleed, forced-balanced operation. Available with patented Envirosave snap pilot to prevent fugitive emissions and reduce bleeding of valuable gases.
  • Snap (On/Off) or throttle (proportional) control
  • Right- or left-hand mount
  • Field-configurable direct or reverse action
  • Removable door
  • Various arm lengths, displacer sizes, diameters, connections and body materials
  • Options include SPDT or DPDT electric switches
Series 1001A Weatherproof Liquid Level Controller
Features a weatherproof case/cover with a secure lever latch to protect internals. Options include marine service and SPDT or DPDT electric switches.

Series 1001 XL
Designed with a back-mount connection.
Series 1400, Type 72-15 Pneumatic Liquid Level Controller
Pneumatic, non-indicating level controller/transmitter used with a Series 1406 torque tube level sensor. Provides throttle control with torque tube accuracy.
  • Pneumatic control ranges:
    5% to 100% proportional band for modulating
    5% to 75% snap range for differential gap or adjustable On/Off control
  • Available in both controller and transmitter
  • Internal 3-to-1 relay maximizes control output
  • Click-type friction lock nozzle allows accurate set in vibration service
  • 3 t o 15 psig, 3 t o 27 psig and 6 t o 30 psig control signal ranges
Series 1400, Type 72-45 Pneumatic Indicating Liquid Level Controller
Pneumatic, indicating level controller/transmitter used with a Series 1406 torque tube level sensor.
  • Dial-in set point
  • 15% to 200% adjustable throttling control
  • Automatic reset and/or rate action
  • 3 t o 15 psig, 3 t o 27 psig and 6 t o 30 psig control signal ranges or adjustable differential gap action