K9900 Series Level Gauge

K9900 Series Level Gauge

K9900 Series Level Gauge


U.S. Patent # 6,857,315 B1

The patented K9900 Series Level Gauge features an innovative casting design which will simplify the installation process and eliminate other typical problems associated with gauge glass. The K9900 Series incorporates floating misalignment unions, which will allow the process connection centerlines to vary +/-1/4″. The gauge also has integral offset pattern valves with ball check shutoffs. 1/2″ FNPT vent and drain connections are inline for routine sight glass maintenance. The K9900 Series Level Gauge delivers a safe, low maintenance, cost effective solution to common sight glass applications.


  • Low to medium pressure applications up to
    500 psig (34.47 bar)
  • Bulk storage tanks
  • Marine
  • Low pressure scrubbers and surge tanks
  • Seal pots
  • Cooling tower water tanks
  • Oil or fuel storage tanks
  • Boiler feedwater tanks

Product Features

  • Floating misalignment unions allow process connection centerlines to vary +/- 1/4″
  • Offset pattern check valves with ball check shutoffs
  • Ball check shutoff valves protect tank inventory
  • Tubular sight glass allows for easy viewing of liquid level
  • Innovative casting design includes all necessary mounting components up to process connection
  • Rugged armored gauge construction protects sight glass from mechanical impact
  • 1/2″ vent and drain ports for routine gauge glass maintenance
  • Additional 1/4″ port available for optional mounting of other instrumentation for level gauge monitoring
  • Custom scales for tank volume or other calibrations are available
  • Armored frame and polycarbonate shield protect operator in case of accident
  • K9900 Model is ABS certified for marine applications


K9900 Series Level Gauge K9900 Series Level Gauge K9900 Series Level Gauge K9900 Series Level Gauge close up


Gauge Style

  • K99 = Gauge with Top & Bottom Integral Valves
  • K9957 = Gauge with Integral Valve on Bottom and 1/2″ MNPT x 3/8″ FNPT Connection on Top

Process Connections

  • M50= 1/2″ MNPT
  • M75= 3/4″ MNPT
  • FL50= 1/2″ Flange
  • FL75= 3/4″ Flange
  • FL1.0= 1″ Flange
  • FL1.5= 1 1/2″ Flange
  • FL2.0= 2″ Flange

Housing Material

  • C= Zinc Plated Carbon Steel
  • A= Stainless Steel

Sight Tube Material

  • GS= 5/8″ O.D. Standard Glass
  • RL= 5/8″ O.D. Redline Glass

*Other sight tube materials available. Consult factory for options


  • V= Fluorocarbon
  • A= Aflas
  • B= Buna-N
  • TES= FEP Encapsulated Silicone
  • E= Ethylene Propylene

*Other Seal Materials Available. Consult Factory For Options.

Shield Options - RH

The Rate/Height shield is used for checking the pump rate of a chemical pump. It is calibrated in QTS/24 Hrs., ML/Min and has a height scale labeled in 1/4″ increments.


Shield Options - H

The Height shield is marked in 1/4″ Increments and labeled every inch.


Shield Options - MRH

The Metric Rate/Height shield is calibrated in ML/Min and Liters/24 hrs. The height scale is labeled in 1 CM divisions.


Shield Options - MH

The Metric Height shield is marked in 1 CM increments and labeled every 5 CM.


Shield Options - M

The Expanded Metal shield is made from flattened expanded metal and is available in electroplated carbon steel or 304 stainless steel.



Shield Options - L

The Clear Polycarbonate shield has no markings, and provides 100% visibility as well as environmental protection.


Custom Shields

KENCO can provide custom scales to meet your needs. The Polycarbonate custom scales are usually engraved and paint-filled. If you are needing scales indicating tank volume or other scale calibrations, please consult the factory.

** Important: Pressure and temperature are dependent on the length of glass and the elastomer chosen. Please consult the factory for minimum and Maximum pressure and temperature constraints.