941

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 U ltrasound technology was developed during WWII under the acronym SONAR (SOund Navigation And Ranging). First applied to the amplifier becomes as oscillator causing a relay circuit in the electronics to indicate a wet gap returns to an idle state. condition. When liquid vacates the gap, the amplifier Pulsed-signal Models 940/941 and 961/962 feature a digital electronic amplifier which produces a powerful pulse of ultrasonic energy five continuous wave units. This pulsed-signal technology will measurement to this day. ment continues to play a significant role in liquid level Ultrasonic instruments are made process control in the 1960s, ultrasonic level measure- for both contact and non-contact (or through-air) level sensing. This of contact ultrasonic products that provide single and dual point liqvirtually every process industry. uid level measurement in ® brochure focuses on the Echotel line to ten times stronger than most provide more accurate measurement in conditions of aeration, suspended solids, turbulence, and highly viscous liquids. high-frequency ultrasonic signal units generates pulses of Continuous-Wave and Pulsed-Signal Sensing The transmit crystal of pulse- is achieved by either continuousswitch uses two piezoelectric Ultrasonic contact level sensing 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. wave or pulsed-signal technology. Our Model 910 continuous-wave other across the transducer gap. crystals positioned opposite each duration. In between each pulse in the gap the receive crystal energy only milliseconds in transmission. If liquid is present detects the pulse and reports a the receive crystal “listens” for the The transmit crystal generates an acoustical signal signal. When liquid is present in the transducer gap, which the receive crystal converts into an electrical wet gap condition to the electronics. When the gap is filled with air, the receive crystal cannot detect the pulse, and reports a dry gap condition. T 2 R 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 brand a world leader in liquid level switches. required, our economical Model 910 with with a tip-sensitive transducer. • For applications where self-test isn’t switch technology has made the ECHOTEL Over 25 years of experience with ultrasonic gap makes them suitable for use in Safety Integrity Level (SIL) 2 loops. Having either relay output or mA current shift capability, Models 961/962 can be used for more process applications, making them the most universal liquid level switches available today. Today’s line offers three distinct product offerings: continuous wave technology is a reliable switch 940/941 offer both advanced tip-sensitive • Though OEM priced, our compact Models 910 Advantages and Limitations ultrasonic technologies are: The advantages of contact level sensing using • Low cost single and dual point sensing. transducers and pulsed signal technology. • Accurate and reliable in a wide variety of liquids. • A broad range of available sensor materials. dielectric or temperature shifts. delay feature. signal technology, advanced self-test and a time Models 961/962 represent the pinnacle of ® Model 962 offer tip-sensitive transducers, pulsed 940/941 • Single Point Model 961 and Dual Point • Easy installation and simple configuration. • Unlike tuning forks, no density adjustments required. • Transmits a stable signal despite liquid property • Switches are 100% electronic and ELECTRO changes in specific gravity, conductivity, pH, and • 10 0 transducer, piezoelectric crystals, and testing for electromagnetic noise, alarms the user of a degrade or require high maintenance. MO VIN G curtail nuisance alarms and relay chattering. An adjustable time delay of 0.5 to 45 seconds helps With extensive FM, CSA, and ATEX approvals malfunction or the presence of EMI/RFI noise. 961 ultrasonic signal. These conditions include: • Extreme aeration of the liquid. Certain process conditions may interfere with the • Slurries with a very high percentage of solids. • Liquids which generate crystallized coatings. • Very aggressive turbulence and splashing. hazardous location. Their SFF* value of over 90% the Models 961/962 are suitable for virtually any At a Glance: Model 910 940 941 961 962 Ultrasonic Technology Continuous Wave Pulsed Signal Pulsed Signal Pulsed Signal Pulsed Signal Contact Ultrasonic Switches Set Points Single Single Single Single Dual Output Relay Relay Current Shift (CS) Relay or CS Relay or CS Mounting Integral Integral Integral Integral or Remote Integral or Remote SIL Loop 3-A N.A. 2 1 2 2 I I I Self-Test Time Delay I I *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. A P RT S ultrasonic switch development at Magnetrol . Their continuous self-testing of electronics, % C• NI contain no moving parts which can ZER O 3 910 Model 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 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: 120 VAC (+10%/-15%), 50/60 Hz 240 VAC (+10%/-15%), 50/60 Hz 24 VDC (±10%) Power Consumption: Relay Output: Gold Flash: Hermetically-Sealed: Repeatability: Fail-Safe: Ambient Temperature: Electronics: Process Temperature: Transducer: Operating Pressure: -40° to +250° F (-40° to +121° C) 800 psig (55 bar) maximum -40° to +160° F (-40° to +71° C) DPDT, 10 amps @ 120 VAC, 240 VAC, or 24 VDC DPDT, 5 amps @ 120 VAC, 240 VAC, 24 VDC 0.078" (2 mm) Field selectable high or low 2.5 VA nominal Liquid Level Applications PROCESS MEDIA: • Clean liquids • Low viscosity liquids • Liquids with low % solids • Corrosive liquids OF SPECIAL INTEREST TO: • Water and Wastewater Treatment • Foods, Beverages, Pharmaceuticals • Oil and Gas Industries • OEM and Skid Manufacturers 4 940/941 High-Performance Ultrasound 3/4” NPT Fitting Tri-Clamp Fitting Level Switches Economical, very compact switches with pulsed signal technology and tip-sensitive transducers. High cost-benefit ratio for OEM switch users. 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: Power Consumption: Signal Output (940): Signal Output (941): Cabling: Repeatability: Response Time: Ambient Temperature: Process Temperature: Maximum Pressure: Ingress Protection: Shock: Vibration: 12 to 35 VDC Less than 1 Watt SPDT relay, 1 amp @ 30 VDC, 0.5 amp@125 VDC, 0.5 amp @150 VAC 8 mA (±1 amp) Dry Gap 16 mA (±1 amp) Wet Gap 12'' (305 mm) flying leads of 18 AWG wires 0.078'' (2 mm) 0.5 second typical -40° to +185° F (-40° to +85° C) -40° to +185° F (-40° to +85 °C) 2000 psig (138 bar); 1500 psig (103 bar) for transducers over 2'' (5 cm) NEMA 4X (IP66) ANSI/ISA-S71.03 Class SA1 ANSI/ISA-S71.03 Class VC2 Liquid Level Applications CONTROL FUNCTIONS: • Pump protection • Fill line monitoring • Interstitial space leak detection • High or low level alarm OF SPECIAL INTEREST TO: • OEM Applications • Pharmaceutical Plants • Food Processors 5 961/962 Innovative Transducer Design Model 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. 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. Electronics Transducer Crystals Interference 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 • Pump and Overfill protection • 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 Engineered Smart 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). 6 961/962 Electronics Specifications With Current Shift Output Supply Voltage: Output: Normal: Alarm Condition: Malfunction: Loop Resistance: Fail-Safe: Power Consumption: Ambient Temperature: With Relay Output Supply Voltage: Relay Outputs: 961: 962: Relay Ratings: DPDT: SPDT: Fail-Safe: Power Consumption: Ambient Temperature: 102 to 265 VAC, or 18 to 32 VDC One DPDT level relay and one SPDT malfunction relay Two DPDT level relays and one SPDT malfunction relay 5 amps @ 120 VAC, 250 VAC, and 30 VDC, 0.15 amp @ 125 VDC 5 amps @ 120 VAC, 250 VAC, and 30 VDC, 0.15 amp @ 125 VDC Field selectable, high or low level Less than 3 watts -40° to +160° F (-40° to +71° C) Shock Class: Vibration Class: Humidity: Compatibility: Manual: 11 to 35 VDC 8 mA 16 mA 3.6 mA or 22 mA selectable 104 ohms with 11 VDC input, 1100 ohms with 35 VDC input Field selectable, high or low level Less than 1 watt -40° to +160° F (-40° to +71° C) Suitable for SIL 2 Loops Worldwide Safety Approvals 3-A Authorized (Model 961) 961/962 Performance Specifications Repeatability: Response Time: Time Delay: Self-Test: Automatic: Continuously verifies operation of electronics, transducer, piezoelectric crystals, and electrical noise Push button verifies operation of electronics, transducer, and piezoelectric crystals ANSI/ISA-S71.03 Class SA1 ANSI/ISA-S71.03 Class VC2 0 – 99%, non-condensing Meets CE Electromagnetic requirements EN 61326 +/- 0.078" (2 mm) 0.5 second typical Variable 0.5 to 45 seconds on rising and falling levels 961 Single Point Transducer Specifications Transducer Material 316 Stainless Steel: 316 Stainless Steel: Hastelloy® C-276®: Hastelloy C-276: Monel®: Kynar® (NPT rating): CPVC (NPT rating): Operating Temperature Range -40° to +325° F (-40° to +163° C) -40° to +325° F (-40° to +163° C) -40° to +325° F (-40° to +163° C) -40° to +325° F (-40° to +163° C) -40° to +325° F (-40° to +163° C) -40° to +250° F (-40° to +121° C) -40° to +180° F (-40° to +82° C) Maximum Pressure 2000 psig (138 bar) 1500 psig (103 bar) 2000 psig (138 bar) 1500 psig (103 bar) 1200 psig (83 bar) 200 psig (14 bar) 200 psig (14 bar) Actuation Length 1" and 2" (3 and 5 cm) 3" to 130" (6 to 330 cm) 1" and 2" (3 and 5 cm) 3" to 130" (6 to 330 cm) 1" to 130" (3 to 330 cm) 2" to 130" (5 to 330 cm) 2" to 130" (5 to 330 cm) 962 Dual Point Transducer Specifications Transducer Material 316 Stainless Steel: CPVC (NPT rating): Operating Temperature Range -40° to +325° F (-40° to +163° C) -40° to +180° F (-40° to +82° C) Maximum Pressure 1500 psig (103 bar) 200 psig (14 bar) Actuation Length 5" to 130" (13 to 330 cm) 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 • info@magnetrol.com 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