FEATURES AND BENEFITS
• Versatile - Suits Many
Applications
Explosion-proof
and dust-tight with wide temperature limits. Choice of supply voltages.
Adjustable differential and adjustable time delay are standard.
• All
Solid-State Construction -
Use of
integrated circuits insures long-term stability, reliability, and reduced
maintenance.
• Simplified
Installation -
Self-contained
unit may be oriented in any position. Mounts directly on installed
Robertshaw Probe Assembly, connected to probe element by rugged disconnect
pin.
• Field
Selectable Operational Modes -
High or low
fail-safe operation established by means of screw-connected mechanical
links.
• Ease of
Calibration and Adjustment -
Built-in
solid-state light aids in calibration (no external meter required). All
adjustments are continuous by means of sealed potentiometers.
• Convenient
Design for Wiring and Maintenance -
Plug-in chassis
assembly provides easy access to wiring and terminal board. Control relay
is of rugged dust tight plug-in design.
• CSA
Certified
See
Specifications.
GENERAL DESCRIPTION
The Robertshaw Model 304B Level-Tek is an all
electronic, RF, capacitance-actuated, on-off control instrument for
detecting predetermined product level changes in tanks, sumps, silos, and
other vessels or containers. Products may include liquids, powder,
granular, lump and flake materials (conductive or non-conductive).
Housed in a CSA Certified explosion-proof and dust-tight
enclosure, the Model 304B is self-contained and features the use of
integrated circuits to insure long-term stability, reliability, and
reduced maintenance. Control action is provided through contacts of a DPDT
dust-tight plug-in relay. The instrument is available with a choice of
three supply voltages, and has adjustable differential (dead band) and
adjustable time delay.
