940-111E-001 Datasheet, PDF (1/4 Pages) Magnetrol International, Inc. – Echotel® Model 940/941 Ultrasonic Level Switch

Echotel^® Model 940/941
Ultrasonic Level Switch
DESCRIPTION
Echotel Model 940 and 941 Ultrasonic Level Switches
are compact integral units that utilize pulsed signal
technology to perform high or low level measurement
in a wide variety of liquid applications. These switches
feature a 316 stainless steel tip-sensitive transducer that
is offered in a variety of NPT, flanged, and sanitary
process connections. The compact electronics are
completely encapsulated just above the process fitting.
The Model 940 offers a 1-amp SPDT relay output. The
Model 941 has a mA current shift output.
FEATURES
• Pulsed electronics for excellent performance in diffi-
cult process conditions and superior immunity from
sources of electromagnetic noise
• Tip-sensitive transducer gap provides reliable opera-
tion by draining viscous liquids and shedding foam
in turbulent applications
• Safety Integrity Level (SIL) data (FMEDA analysis) is
available. Model 940 is suitable for SIL 2 loops.
Model 941 is suitable for SIL 1 loops.
• Extremely compact unit is easily installed in areas
where access space is limited
• 1 amp SPDT relay output (940), or
mA current shift (941) output
• No calibration or configuration necessary
High alarm Low alarm
Filling line
High alarm
Model 940/941
with Tri-Clamp^® fitting
Model 940/941
with ³â„4" NPT
Model 940/941
with ANSI flange
APPLICATIONS
The Model 940/941 can be applied in a wide variety of
high or low liquid level applications, pump protection,
and fill line monitoring as shown in the diagram at the
left. These compact units can also be installed in the
interstitial space between two tank walls for fluid leak
detection.
Small size and simplicity of installation make these units
ideal for OEM skids as a low cost, yet high performance
level measurement solution. They are also the perfect
replacement for older floats, conductivity switches, and
tuning forks.
Low alarm
Typical Mounting Orientations
Pump
Pump
protection