Echotel® Model 911/921 Ultrasonic Level Switches D E S C R I P T I O N Echotel Model 911/921 ultrasonic level switches sense the presence or absence of liquids in a transducer gap by utilizing continuous wave ultrasonic technology. These units are suitable for clean liquid applications having low viscosity, low aeration and a low percent of solids. The measurement is not affected by shifts of specific gravity or conductivity. F E A T U R E S • Single or dual point • Integral or remote mount • Local and remote self-test Model 921 with dual gap transducer and NEMA 4X housing • Requires no calibration • FM and CSA hazardous area approvals • Actuation lengths to 130 inches (3.3 meters) • Choice of electronics housings include NEMA 4X or NEMA 4X/7/9 • NEMA 7/9 transducer housing for remote mount applications • Input power: 120 VAC, 50/60 Hz, 240 VAC 50/60 Hz, 24 VDC, 12 VDC • Output includes a 10 amp DPDT or 5 amp DPDT hermetically sealed relay, TTL, and open collector • Choice of transducer materials: 316 stainless steel, CPVC, Hastelloy B or C, Kynar, Monel, Polypropylene, Teflon® • Adjustable time delay compensates for splashing or turbulence of the process fluid A P P L I C A T I O N S • Clean liquids • Separators • Light viscous liquids • Accumulators • Low % solid in liquids • Receivers • Corrosive liquids • Scrubbers • Storage tanks • Knock out drums • Sumps • Drip traps T E C H N O L O G Y Model 911/921 level switches use ultrasonic energy to detect the presence or absence of liquid in a side gap transducer. The principle behind ultrasonic contact technology is that high-frequency sound waves are easily transmitted across a transducer gap in the presence of liquid, but are attenuated when the gap is dry. The Model 911/921 uses this ultrasonic technology to perform liquid level measurement in a wide variety of process media and application conditions. The transducer uses a pair of piezoelectric crystals that are encapsulated in epoxy in the transducer gap. The crystals are made of a ceramic material, that vibrates at a given frequency when subjected to an applied voltage. The transmit crystal converts the applied voltage from the electronics into an ultrasonic signal. When liquid is present in the gap, the receive crystal is able to sense the ultrasonic signal from the transmit crystal and convert it back to an electrical signal. This signal is sent to the electronics to indicate the presence of liquid in the transducer gap. When there is no liquid present, the ultrasonic signal is attenuated, and is not detected by the receive crystal. Ultrasonic transducer Transmit crystal Receive crystal Ultrasonic signal transmission across gap 2 T Y P I C A L A P P L I C A T I O N S Model 911/921 switches may be used for high or low level alarm, as well as for pump protection. Dual Point High Alarm The single point 911 can be mounted vertically or horizontally in vessels, bridles, or pipes. The dual gap 921 is always top mounted. Gas A broad selection of metallic and thermoplastic transducer materials allows the 911/921 to be used in a wide variety of industrial and municipal applications. Liquid Low Alarm Low Alarm A G E N C Y AGENCY FM CSA A P P R O V A L S MODEL APPROVED AREA CLASSIFICATION 9X1-XXXX-A1X 9X1-XXXX-E1X 9X1-XXXX-F1X NEMA 4X Class I, II, III, Div. 1; Groups C, D, E, F, & G NEMA 4X Class I, II, III, Div. 1; Groups B, C, D, E, F, & G NEMA 4X TYPE 4X 9X1-XXXX-H1X with transducer 58X-1AXX-XXX 9X1-A1AX-A1X 9X1-B1CX-A1X 9X1-XXXX-E1X 9X1-XXXX-F1X ➀ 9X1-A1AX-H10 9X1-B1CX-H10 with transducers 58X-1A22-XXX 58X-1AHB-XXX 58X-1AHC-XXX 58X-1AMM-XXX ➀ ➁ ➁ All transducer materials approved except polypropylene All transducer materials approved except CPVC, teflon, kynar, and polypropylene Class I, II, III, Div. 1; Groups C, D, E, F, & G TYPE 4X Class I, II, III, Div. 1; Groups B, C, D, E, F, & G TYPE 4X These units have been tested to EN 50081-2 and EN 50082-2 and are in compliance with the EMC Directive 89/336/EEC. 3 S P E C I F I C A T I O N S E L E C T R I C A L Power supply 120 VAC, 50/60 Hz (+10%/-15%) 240 VAC, 50/60 Hz (+10%/-15%) 24 VDC (±10%) 12 VDC (±10%) Output Signal Options Gold Flash relay, DPDT 10 amps @ 120/240 VAC or 24 VDC Hermetic relay, DPDT 5 amps @ 120/240 VAC or 24 VDC TTL➀ 1 TTL load Open collector ➀ VCE max: 40 VDC, Power max: 300 mw Power consumption 2.5 VA nominal Repeatability 0.078" (1.98 mm) Fail-safe Field selectable high or low Time delay 0 – 60 seconds nominal Self test Local magnetic Remote electrical by push button Calibration Not required Ambient temperature -40° to +160° F (-40° to +71° C) ➀ Self-test feature not available. Consult factory for additional information. S P E C I F I C A T I O N S T R A N S D U C E R Material (Code) 316 Stainless Steel (22) Hastelloy B (HB) Hastelloy C (HC) Monel (MM) CPVC (CC) Polypropylene (YY) Kynar (KK) Teflon (FF) 4 Operating Temperature Range -40° to +250° F (-40° to +121° C) -40° to +250° F (-40° to +121° C) -40° to +250° F (-40° to +121° C) -40° to +250° F (-40° to +121° C) -40° to +250° F (-40° to +121° C) -40° to +250° F (-40° to +121° C) +32° to +250° F (0° to +121° C) +0° to +250° F ( -18° C to +121° C) Maximum Operating Pressure 800 PSIG (55 bar) 800 PSIG (55 bar) 800 PSIG (55 bar) 800 PSIG (55 bar) 100 PSIG (7 bar) 100 PSIG (7 bar) 100 PSIG (7 bar) 100 PSIG (7 bar) Minimum/Maximum Actuation Length Available With Model: 1"/130" 1"/130" 1"/130" 1"/130" 1"/130" 1"/130" 1"/130" 1"/48" 911 & 921 911 & 921 911 & 921 911 & 921 911 & 921 911 Only 911 Only 911 Only D I M E N S I O N A L I N C H E S S P E C I F I C A T I O N S ( M M ) 9.88 (251) 8.67 (220) 3/4" NPT Conduit Connection 3/4" NPT Conduit Connection 1/2" NPT (std.) 3/4" NPT (opt.) Transducer/ Amplifier Cable Connection 3.00 (76) 3.75 (95) 3.00 (76) 3.00 (76) 3.75 (95) Model 911 and 921 Remote Mount with NEMA 4X Carbon Steel Housing (Housing Code A) 3.25 (83) Model 911 Remote Mount with NEMA 4X/7/9 Cast Aluminum Housing (Housing Code E) 3.00 (76) Rotation Clearance Rotation Clearance 8.90 (226) 9.04 (230) 3/4" NPT Conduit Connection 3/4" NPT Conduit Connection 3/4" NPT Thread 3/4" NPT Thread Actuation Length Actuation Length Actuation Actuation 1.62 (41) 1.62 (41) .87 (22) Dia. Model 911 Integral Mount with NEMA 4X Carbon Steel Housing (Housing Code A) .87 (22) Dia. Model 911 Integral Mount with NEMA 4X/7/9 Cast Aluminum Housing (Housing Code E) 5.25 (133) 10.81 (275) 3.00 (76) 1/2" NPT (std.) 3/4" NPT (opt.) Transducer/ Amplifier Cable Connection Rotation Clearance 1" NPT Conduit Connection 3.00 (76) 3.75 (95) 5.25 (133) 1/2" NPT (std.) 3/4" NPT (opt.) Transducer/ Amplifier Cable Connection Model 921 Remote Mount with NEMA 4X/7/9 Cast Iron Housing (Housing Code H or F) 4.63 (118) Dia. 3.00 Rotation (76) clearance 2.75 (70) 3/4" NPT Remote Transducer Housing 10.56 (268) 1" NPT Conduit Connection 3/4" NPT Thread 1.00 (25) Min. Actuation 4.00 (101) Min. 20.00 (508) Actuation Max. Distance Between Gaps 1.62 (41) .87 (22) Dia. Model 921 Integral Mount with NEMA 4X/7/9 Cast Iron Housing (Housing Code H or F) 5 E L E C T R O N I C S M O D E L Models available for quick shipment, usually within one week after factory receipt of a purchase order, through the Expedite Ship Plan (ESP) N U M B E R SET POINTS 911 921 Single point ultrasonic level switch Dual point ultrasonic level switch OUTPUT SIGNAL A1A DPDT gold flash relay; 10 amps @ 120/240 VAC or 24 VDC B1C DPDT hermetically sealed relay; 5 amps @ 120/240 VAC or 24 VDC E1H➀ TTL, 1 TTL load F1H ➀ Open collector, VCE max: 40 VDC, IC max: 125 mA sink current, Power max: 300 mw ➀ Self-test feature not available. Consult factory for additional information. INPUT 0 1 2 3 POWER 120 VAC 240 VAC 24 VDC 12 VDC HOUSING A Carbon steel NEMA 4X (nonhazardous) E Cast aluminum NEMA 4X/7/9 for 911➁ F Cast iron NEMA 4X/7/9 for 921➂ H Cast iron NEMA 4X/7/9 with Group B approvals ➁ Available on Model 911 units only. ➂ Available on Model 921 units only. MOUNTING 0 Integral 1 9 1 1 C O N N E C T I N G M O D E L Remote (requires cable selection from below) C A B L E N U M B E R CABLE TYPE A1 RG 178 (Model 911), 1–50 ft. (0.3–15 m) A2 RG 178 (Model 921), 1–50 ft. (0.3–15 m) B1 RG 58 (Model 911), 51–300 ft. (15–90 m) B2 RG 58 (Model 921), 51–300 ft. (15–90 m) CABLE LENGTH Length of cable from remote amplifier to remote transducer in feet (300 feet maximum). Example: 12 feet = Code 012 3 6 7 0 1 1 T R A N S D U C E R M O D E L N U M B E R SET POINTS 1 2 Single gap transducer Dual gap transducer PROCESS CONNECTION 1A 3⁄4" NPT TRANSDUCER MATERIALS 22 316 stainless steel HB Hastelloy B HC Hastelloy C MM Monel CC CPVC YY Polypropylene KK Kynar FF Teflon (maximum actuation length = 48") ACTUATION LENGTH (INCHES) Single point transducer: 1 to 130 inches in 1 inch increments Example: 4 inches = 004 Available ESP lengths: 1'', 3", 4'', 6'', 8'', 10'', 12'' Dual point transducer: 4 to 130 inches in 1 inch increments Example: For a dual point unit with actuation points at 7'' and 18'', specify code 018 and “B” dimension = 7''. If the gaps are more than 20'' apart, consult factory. NOTES: Use the “A” dimension from drawing below as actuation length. The “B” dimension must also be specified. Maximum distance between actuation points A and B is 20" (508 mm). Minimum distance is 3.00" (76 mm). For longer distance consult factory. Actuation length B B "A" Dim. 4.00" (101) min. "B" Dim. 1.00 (25) min. A 20 (508) max. Actuation length A 1.62 (41) .87 (22) Dia. 5 8 1 A 7 Q U A L I T Y The quality assurance system in place at Magnetrol guarantees the highest level of quality throughout the company. Magnetrol is committed to providing full customer satisfaction both in quality products and quality service. Magnetrol’s quality assurance system is registered to ISO 9001 affirming its commitment to known international quality standards providing the strongest assurance of product/service quality available. Several Echotel Model 911/921 Ultrasonic Level Switches are available for quick shipment, usually within one week after factory receipt of a purchase order, through the Expedite Ship Plan (ESP). To take advantage of ESP, simply match the color coded model number codes (standard dimensions apply). E S P Expedite Ship Plan Models covered by ESP service are conveniently color coded in the selection data charts. ESP service may not apply to orders of ten units or more. Contact your local representative for lead times on larger volume orders, as well as other products and options. W A R R A N T Y All Magnetrol electronic level and flow controls are warranted free of defects in materials or workmanship for one full year from the date of original factory shipment. If returned within the warranty period; and, upon factory inspection of the control, the cause of the claim is determined to be covered under the warranty; then, Magnetrol will repair or replace the control at no cost to the purchaser (or owner) other than transportation. Magnetrol shall not be liable for misapplication, labor claims, direct or consequential damage or expense arising from the installation or use of equipment. There are no other warranties expressed or implied, except special written warranties covering some Magnetrol products. For additional information, see Instruction Manual 51-601 5300 Belmont Road • Downers Grove, Illinois 60515-4499 • 630-969-4000 • Fax 630-969-9489 • www.magnetrol.com 145 Jardin Drive, Units 1 & 2 • Concord, Ontario Canada L4K 1X7 • 905-738-9600 • Fax 905-738-1306 Heikenstraat 6 • B 9240 Zele, Belgium • 052 45.11.11 • Telex 25944 • Fax 052 45.09.93 Regent Business Ctr., Jubilee Rd. • Burgess Hill, Sussex RH15 9TL U.K. • 01444-871313 • Fax 01444-871317 Copyright © 2004 Magnetrol International, Incorporated. All rights reserved. Printed in the USA. Magnetrol and Magnetrol logotype are registered trademarks of Magnetrol International. Performance specifications are effective with date of issue and are subject to change without notice. The brand and product names contained within this document are trademarks or registered trademarks of their respective holders. BULLETIN: 51-102.13 EFFECTIVE: January 2004 SUPERSEDES: February 2002