E C H O T E L® C O N TA C T U LT R A S O U N D Contact Ultrasonic Level Sensing FROM ltrasound technology was developed during the amplifier becomes as oscillator causing a relay Navigation And Ranging). First applied to condition. When liquid vacates the gap, the amplifier U WWII under the acronym SONAR (SOund process control in the 1960s, ultrasonic level measure- ment continues to play a significant role in liquid level measurement to this day. circuit in the electronics to indicate a wet gap returns to an idle state. Pulsed-signal Models 940/941 and 961/962 feature a digital electronic amplifier Ultrasonic instruments are made which produces a powerful for both contact and non-contact pulse of ultrasonic energy five (or through-air) level sensing. This to ten times stronger than most brochure focuses on the Echotel line continuous wave units. This ® of contact ultrasonic products that pulsed-signal technology will provide single and dual point liq- provide more accurate measure- uid level measurement in ment in conditions of aeration, virtually every process industry. suspended solids, turbulence, and highly viscous liquids. The transmit crystal of pulse- Continuous-Wave and Pulsed-Signal Sensing signal units generates pulses of Ultrasonic contact level sensing is achieved by either continuous- wave or pulsed-signal technology. Our Model 910 continuous-wave switch uses two piezoelectric crystals positioned opposite each other across the transducer gap. high-frequency ultrasonic Challenging process conditions such as suspended solids or aeration are best managed with pulsed-signal technology. Models 961/962 switches further minimize the effects of mild turbulence or splashing with adjustable time delays. duration. In between each pulse the receive crystal “listens” for the transmission. If liquid is present in the gap the receive crystal detects the pulse and reports a The transmit crystal generates an acoustical signal wet gap condition to the electronics. When the gap is filled signal. When liquid is present in the transducer gap, reports a dry gap condition. which the receive crystal converts into an electrical T 2 energy only milliseconds in R with air, the receive crystal cannot detect the pulse, and Contact ultrasonic level switches use ceramic discs called piezoelectric crystals to transmit and receive ultrasonic energy. A transmit crystal (T) is positioned on one side of a transducer gap and a receive crystal (R) is positioned on the opposite side. Tipsensitive style gaps—the only style used on Echotel® switches— can sense level to within 1⁄4" from the end of the transducer. 25+ Years of Ultrasonic Measurement Solutions for Industrial Process Application Guidelines makes them suitable for use in Safety Integrity Level switch technology has made the ECHOTEL shift capability, Models 961/962 can be used for more (SIL) 2 loops. Having either relay output or mA current Over 25 years of experience with ultrasonic gap process applications, making them the most universal brand a world leader in liquid level switches. liquid level switches available today. Today’s line offers three distinct product offerings: • For applications where self-test isn’t required, our economical Model 910 with Advantages and Limitations The advantages of contact level sensing using continuous wave technology is a reliable switch with a tip-sensitive transducer. • Though OEM priced, our compact Models 910 ultrasonic technologies are: • Low cost single and dual point sensing. • Accurate and reliable in a wide variety of liquids. 940/941 offer both advanced tip-sensitive • Unlike tuning forks, no density adjustments required. transducers and pulsed signal technology. • Easy installation and simple configuration. • Single Point Model 961 and Dual Point • A broad range of available sensor materials. Model 962 offer tip-sensitive transducers, pulsed changes in specific gravity, conductivity, pH, and degrade or require high maintenance. transducer, piezoelectric crystals, and testing for electromagnetic noise, alarms the user of a malfunction or the presence of EMI/RFI noise. 961 An adjustable time delay of 0.5 to 45 seconds helps curtail nuisance alarms and relay chattering. MO VIN G P Certain process conditions may interfere with the ultrasonic signal. These conditions include: With extensive FM, CSA, and ATEX approvals the Models 961/962 are suitable for virtually any hazardous location. Their SFF* value of over 90% At a Glance: RT contain no moving parts which can O Their continuous self-testing of electronics, ELECTRO ZER ultrasonic switch development at Magnetrol . % C• NI • Switches are 100% electronic and ® S dielectric or temperature shifts. Models 961/962 represent the pinnacle of A delay feature. • Transmits a stable signal despite liquid property 940/941 • 10 0 signal technology, advanced self-test and a time • Slurries with a very high percentage of solids. • Extreme aeration of the liquid. • Liquids which generate crystallized coatings. • Very aggressive turbulence and splashing. Contact Ultrasonic Switches Model Ultrasonic Technology Set Points Output Mounting SIL Loop 3-A 910 Continuous Wave Single Relay Integral N.A. 940 Pulsed Signal Single Relay Integral 2 941 Pulsed Signal Single Current Shift (CS) Integral 1 961 Pulsed Signal Single Relay or CS Integral or Remote 2 962 Pulsed Signal Dual Relay or CS Integral or Remote 2 Self-Test Time Delay *In the language of Safety Instrumented Systems (SIS), Safe Failure Fraction (SFF) indicates all safe and dangerous detected failures. The Models 940 and 961/962 SFF values are over 90%, which allows them to be used in SIL 2 loops. 3 910 Level Switch A reliable switch featuring a 10 amp DPDT gold flash relay field-selectable for high or low level failsafe. Worldwide safety approvals, 2-year warranty. Proximity Sensing Model 910 The Model 910 features a tip-sensitive transducer which measures liquid level to within 0.25" (6 mm) from the end of its transducer. When used as a low level switch, it can measure level further down into a tank or vessel. Omni-Directional Mounting Model 910 may be mounted horizontally or vertically. Mounting options include NPT and BSP threaded, flanges and sanitary connections. Worldwide Safety Approvals With FM, CSA and ATEX approvals on one agency nameplate, this is the perfect switch for OEM applications with global customer destinations. Model 910 Electrical Specifications Power Supply: Liquid Level Applications 120 VAC (+10%/-15%), 50/60 Hz 240 VAC (+10%/-15%), 50/60 Hz 24 VDC (±10%) Power Consumption: 2.5 VA nominal PROCESS MEDIA: Relay Output: Gold Flash: Hermetically-Sealed: DPDT, 10 amps @ 120 VAC, • Clean liquids 240 VAC, or 24 VDC • Low viscosity liquids DPDT, 5 amps @ 120 VAC, 240 VAC, 24 VDC Repeatability: 0.078" (2 mm) Fail-Safe: Field selectable high or low • Liquids with low % solids • Corrosive liquids OF SPECIAL INTEREST TO: Ambient Temperature: Electronics: -40° to +160° F (-40° to +71° C) • Foods, Beverages, Pharmaceuticals Process Temperature: Transducer: Operating Pressure: 4 • Water and Wastewater Treatment -40° to +250° F (-40° to +121° C) 800 psig (55 bar) maximum • Oil and Gas Industries • OEM and Skid Manufacturers 940/941 Level Switches Economical, very compact switches with pulsed signal technology and tip-sensitive transducers. High cost-benefit ratio for OEM switch users. High-Performance Ultrasound Tri-Clamp Fitting 3/4” NPT Fitting Pulsed signal technology excels in difficult conditions that may cause other ultrasonic switches to falter. This technology also provides excellent immunity from electrical noise that is common in many industrial applications. Choice of Electronics Model 940 Relay Version offers a 1 amp SPDT relay output. ANSI Fitting Model 941 Current-Shift Version offers a mA current shift output. Suitable for SIL Loops Safety Integrity Level (SIL) data is available for the 940/941 switches in the form of a Failure Modes, Effects and Diagnostic Analysis (FMEDA) report. The Model 940 is suitable for use in SIL 2 loops, and the Model 941 is suitable for use in SIL 1 loops. Model 940/941 Specifications Power Supply: 12 to 35 VDC Power Consumption: Less than 1 Watt Signal Output (940): SPDT relay, 1 amp @ 30 VDC, 0.5 amp@125 VDC, 0.5 amp @150 VAC Signal Output (941): Cabling: 8 mA (±1 amp) Dry Gap Liquid Level Applications CONTROL FUNCTIONS: 16 mA (±1 amp) Wet Gap • Pump protection 12'' (305 mm) flying leads of • Fill line monitoring 18 AWG wires • Interstitial space leak detection Repeatability: 0.078'' (2 mm) Response Time: 0.5 second typical Ambient Temperature: -40° to +185° F (-40° to +85° C) Process Temperature: -40° to +185° F (-40° to +85 °C) Maximum Pressure: 2000 psig (138 bar); 1500 psig (103 bar) for transducers over 2'' (5 cm) • High or low level alarm OF SPECIAL INTEREST TO: • OEM Applications Ingress Protection: NEMA 4X (IP66) • Pharmaceutical Plants Shock: ANSI/ISA-S71.03 Class SA1 • Food Processors Vibration: ANSI/ISA-S71.03 Class VC2 5 961/962 Level Switches When you add-up the features, these all new single and dual point switches are superior to any ultrasonic or tuning fork level switch on the market. Innovative Transducer Design Model 962 The tip-sensitive transducers have a pressure rating (up to 2000 psig, 138 bar) higher than any other ultrasonic gap or tuning fork level switch. The dual gap transducer has a unique flow-through upper gap that allows over 100" (254 cm) between upper and lower gaps. Combine these features with powerful pulsed signal technology for superior performance in difficult process conditions and you have the most capable ultrasonic level switch available today. Model 961 Advanced Self-Test Technology New self-test technology not only tests the electronics, transducer, and piezoelectric crystals, but also checks for the presence of electromagnetic noise interference. Should the diagnostic data indicate a problem with the unit, an alarm signal alerts the user to the malfunction. Adjustable Time Delay Liquid Level Applications Turbulence and splashing can cause many switches with fixed time response to produce false level alarms. Model 961/962 switches overcome this nuisance with an adjustable time delay. A potentiometer sets a 1⁄2 to 45 second delay to disregard waves or splashes so the unit reliably detects true liquid level. CONTROL FUNCTIONS: • High or Low level alarm Engineered Smart • Pump and Overfill protection Designed for wiring and configuration ease, the ergonomic housing contains electronics, relays, time delay potentiometer, pushbuttons for level and for malfunction alarm testing, high/low level DIP switch, and independent/joint DIP switch (line-powered Model 961 shown). • Single-point 3-A sanitary • Seal Pot level OF SPECIAL INTEREST TO: • Chemical, Petrochemical • Water and Wastewater • Food and Pharmaceutical • Pulp and Paper • Power Generation 6 Electronics Transducer Crystals Interference 961/962 Electronics Specifications With Current Shift Output Supply Voltage: Output: 11 to 35 VDC Normal: Alarm Condition: Malfunction: Loop Resistance: Worldwide Safety Approvals 16 mA 3.6 mA or 22 mA selectable 1100 ohms with 35 VDC input Fail-Safe: Field selectable, high or low level Power Consumption: Less than 1 watt Ambient Temperature: -40° to +160° F (-40° to +71° C) 961/962 Performance Specifications Repeatability: +/- 0.078" (2 mm) Response Time: 0.5 second typical Time Delay: Variable 0.5 to 45 seconds on rising and falling levels Self-Test: Automatic: Continuously verifies With Relay Output Supply Voltage: 961: 102 to 265 VAC, or 18 to 32 VDC operation of electronics, One DPDT level relay and one transducer, piezoelectric crystals, and electrical noise SPDT malfunction relay 962: Relay Ratings: 3-A Authorized (Model 961) 8 mA 104 ohms with 11 VDC input, Relay Outputs: Suitable for SIL 2 Loops DPDT: Manual: Two DPDT level relays and one SPDT malfunction relay operation of electronics, 5 amps @ 120 VAC, 250 VAC, and transducer, and piezoelectric crystals 30 VDC, 0.15 amp @ 125 VDC SPDT: Push button verifies 5 amps @ 120 VAC, 250 VAC, and Shock Class: ANSI/ISA-S71.03 Class SA1 30 VDC, 0.15 amp @ 125 VDC Vibration Class: ANSI/ISA-S71.03 Class VC2 0 – 99%, non-condensing Meets CE Electromagnetic Fail-Safe: Field selectable, high or low level Humidity: Power Consumption: Less than 3 watts Compatibility: Ambient Temperature: -40° to +160° F (-40° to +71° C) requirements EN 61326 961 Single Point Transducer Specifications Transducer Material Operating Temperature Range Maximum Pressure Actuation Length 316 Stainless Steel: -40° to +325° F (-40° to +163° C) 2000 psig (138 bar) 1" and 2" (3 and 5 cm) 316 Stainless Steel: -40° to +325° F (-40° to +163° C) 1500 psig (103 bar) 3" to 130" (6 to 330 cm) Hastelloy® C-276®: -40° to +325° F (-40° to +163° C) 2000 psig (138 bar) 1" and 2" (3 and 5 cm) Hastelloy C-276: -40° to +325° F (-40° to +163° C) 1500 psig (103 bar) 3" to 130" (6 to 330 cm) Monel®: -40° to +325° F (-40° to +163° C) 1200 psig (83 bar) 1" to 130" (3 to 330 cm) Kynar® (NPT rating): -40° to +250° F (-40° to +121° C) 200 psig (14 bar) 2" to 130" (5 to 330 cm) CPVC (NPT rating): -40° to +180° F (-40° to +82° C) 200 psig (14 bar) 2" to 130" (5 to 330 cm) 962 Dual Point Transducer Specifications Transducer Material Operating Temperature Range Maximum Pressure 316 Stainless Steel: -40° to +325° F (-40° to +163° C) 1500 psig (103 bar) 5" to 130" (13 to 330 cm) Actuation Length CPVC (NPT rating): -40° to +180° F (-40° to +82° C) 200 psig (14 bar) 5" to 130" (13 to 330 cm) 7 CORPORATE HEADQUARTERS 5300 Belmont Road • Downers Grove, Illinois 60515-4499 USA Phone: 630-969-4000 • Fax: 630-969-9489 www.magnetrol.com • [email protected] EUROPEAN HEADQUARTERS Heikensstraat 6 • 9240 Zele, Belgium Phone: 052 45.11.11 • Fax: 052 45.09.93 BRAZIL: Av. Dr. Mauro Lindemberg Monteiro • 185-Jd. Santa Fé, Osasco • São Paulo CEP 06278-010 CANADA: 145 Jardin Drive, Units 1 & 2 • Concord, Ontario L4K 1X7 CHINA: Plant 6, No. 191, Huajin Road • Minhang District • Shanghai 201109 DEUTSCHLAND: Alte Ziegelei 2–4 • D-51491 Overath DUBAI: DAFZA Office 5AE 722, P.O. Box 293671 • Dubai, United Arab Emirates INDIA: C-20 Community Centre • Janakpuri, New Delhi 110 058 ITALIA: Via Arese, 12 • 20159 Milano SINGAPORE: 33 Ubi Avenue 3 • #05-10 Vertex • Singapore 408868 UNITED KINGDOM: Regent Business Centre • Jubilee Road • Burgess Hill, West Sussex RH15 9TL Copyright © 2010 MAGNETROL INTERNATIONAL, INCORPORATED. All rights reserved. Printed in the USA. MAGNETROL, the MAGNETROL logotype and ECHOTEL are trademarks of MAGNETROL INTERNATIONAL, INCORPORATED. Hastelloy® C-276® is a trademark of Haynes International. Kynar® is a trademark of The Pennwalt Corporation. Monel® is a trademark of Inco Alloys International, Inc. Bulletin: 51-170.1 • Effective: May 2006