Ultrasonic

Level Switches

SIL Safety Manual for

Echotel Model 961/962

Application

Echotel Model 961/962 ultrasonic level switches utilize

pulsed signal technology to detect high, low, or dual-

point level in a broad range of liquid media applications.

The advanced self-test technology provides reliability

and continuous testing of electronics, transducer, piezo-

electric crystals, and electromagnetic noise.

Benefits

The Echotel Model 961/962 ultrasonic level switches

provide the following benefits:

• Single or dual point liquid level measurement

• Adjustable time-delay for turbulent aerated liquids

• Reliable liquid level measurement independent of

changes in media density, conductivity, or temperature

• Relay output or mA current shift with separate

malfunction indication

• Integral or remote mount electronics

• Pulsed signal technology

• Extensive FM, CSA, and ATEX explosion proof and

intrinsically safe approvals

• Suitable for Safety Integrity Level (SIL) 2 loops

Functional Safety Manual

This manual complements and is intended to be used with

the Magnetrol Echotel Model 961/962 Ultrasonic Single and

Dual Point Level Switches Installation and Operating Manual

(Bulletin 51-646, dated October 2008 or later).

Model 961

Model 962