Consent Preferences

6400 Series

All Stainless Steel Construction for Highly Corrosive Applications

The 6400 Series Senior Gauges are especially designed for chemical service with all wetted parts made of stainless steel except the nickel-plated Alnico drive magnet.

General Information & Features
The 6400 Series gauges are available in gear-action models for top, centerline or angle mounting, or in lever-action models for centerline mounting only. They are mounted to tank using Senior flanges 2 1⁄2″ bolt circle [63,5] by four #0040-00666 5⁄16 -24 x 3⁄4 bolts. A #0015-00462 spiral-wound, Teflon gasket is standard.

Data Sheet
MS-501/502 Installation Instructions
Adapters 22 Series – Senior Stainless Steel

Model Number Action Mounting Dial, Sender or Switch Data
6440 Gear Top Senior TwinSite® Sender in choice of 0-30, 0-90, or 240-30 Ohm ranges. Direct-reading dials may also be used.
6443 C/L or Angle
L6443 Lever C/L
6450 Gear Top Standard switch #5023s00778 S.P.S.T. VAC/50 VDC 1/2 Amp. Please furnish tank drawings and switch points so proper gauge and calibration can be supplied. Other switches available, see DS-364.
6453 C/L or Angle
L6453 Lever C/L
6460 Gear Top #5002s00570 Senior side-reading fractional.
6480 #5002s00062 Senior direct-reading fractional.
6483 C/L or Angle
L6483 Lever C/L #5002s00547 Senior direct-reading fractional.
6490 Gear Top #5013s00456 4″ fractional dial.
6493 C/L or Angle
L6493 Level C/L

Gallonage and percentage dials are available for models 6480 through L6493 at extra cost.

General Specifications*

Accuracy depends upon proper gauge sizing. Senior dials +/-6%, TwinSite® dials +/-10%. Accuracy may be less depending upon tank shape. Accuracy may be less near full and empty. Accuracy may be less if tank is not level. This gauge is not to be used for filling. All accuracy estimates are expressed as a percent of full scale.

Recommended Mounting-Screw Torque
12 lb.-ft. [16,4 Mn]

Standard operating temperature range is -40°F to 158°F, -40°C to 70°C. +350°F, 177°C available on special order.

Passes MIL-S-901 B Naval Standard Shock Test.

Passes MIL-STD-167 Naval Standard Vibration Test.

0.5 watts maximum for TwinSite® versions.

Maximum Service Pressure
500PSIG [34 Bar] (Standard). Service pressure up to 575 PSIG [39,6 Bar] available on special order.

These direct indicating gauges are UL listed for flammable liquids.

Note: For installation instructions see MS-501/502 (mounting standard).

Materials of Construction*

Head, Centershaft, Support Tube, Gears, Cross Stud, Gear Housing, Bearings, Float, & Float Rod
Stainless steel.

Drive Magnet
Plated Alnico.

Mounting Bolts
Stainless steel.

Mounting Gasket
Teflon and stainless steel.

Direct-Reading Dial
Aluminum with acrylic crystal, hermetically sealed.

Side-Reading Dial
Aluminum with polycarbonate crystal, hermetically sealed.

Standard 4″ Dial
Aluminum with glass crystal, hermetically sealed.

TwinSite® Sender

When Ordering Specify:

1. Gauge model number.
2. Tank diameter and riser height.
3. Mounting locations.
4. OHM range on TwinSite® versions.
5. Preferred switch on switch gauges, if other than standard.
6. Service pressure.
7. Any listed options.

*Materials and specifications are subject to change without notice. Pressure ratings subject to change due to temperature and other environmental considerations.

Product Inquiry - 6400

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    Revised 04-28-2015