L-GAGE(R) LT3 Long-Range Retro Time-of-Flight Laser Sensor Self-contained Class 1 laser distance sensor, analog and discrete outputs Features * Extremely long range: 50 m with included BRT-TVHG-8x10P high-grade target * Banner's unique scalable analog output automatically distributes the output signal over the width of the programmed sensing window * Analog and Discrete (switched) outputs in each sensor, with independent window limits * Discrete output can be used for precision background suppression * Choose NPN or PNP discrete output, plus 0 to 10V dc or 4 to 20 mA sourcing analog output * Fast, easy-to-use integrated push-button TEACH-mode programming; no potentiometer adjustments * Remote TEACH function for security and convenience * Output response is programmable for three speeds * Choose 2 m or 9 m unterminated cable, or 8-pin Euro-style swivel QD connector * Rugged construction withstands demanding sensing environments; rated IEC IP67, NEMA 6 ! Not To Be Used for Personnel Protection Never use these products as sensing devices for personnel protection. Doing so could lead to serious injury or death. These sensors do NOT include the self-checking redundant circuitry necessary to allow their use in personnel safety applications. A sensor failure or malfunction can cause either an energized or de-energized sensor output condition. Consult your current Banner Safety Products catalog for safety products which meet OSHA, ANSI and IEC standards for personnel protection. ! RETRO LASER WARNING . . . CAUTION . . . This sensor contains no userserviceable components. Do not attempt to repair. Incorrect component values may produce hazardous laser radiation levels. Printed in USA Models Models Sensing Distance Cable* 2 m (6.5') 8-wire LT3PULV LT3NULVQ LT3PILV LT3PILVQ 0.5 to 50 m (19.7" to 164') for reflector BRT-TVHG-8X10P (see specifications for more information.) 2 m (6.5') 8-wire 8-pin Euro-style QD 2 m (6.5') 8-wire 8-pin Euro-style QD 2 m (6.5') 8-wire LT3NILV 8-pin Euro-style QD LT3NILVQ Discrete Output Analog Output PNP (Sourcing) 8-pin Euro-style QD LT3PULVQ LT3NULV Supply Voltage NPN (Sinking) Analog Voltage (0 to 10V dc) 12 to 24V dc PNP (Sourcing) NPN (Sinking) Analog Current (4 to 20 mA) * 9 m cables are available by adding suffix "W/30" to the model number of any cabled sensor (e.g., LT3PULV W/30). A model with a QD connector requires a mating cable; see page 10. NOTE: See Banner website for information on diffuse and dual-discrete models at: www.bannerengineering.com 02/05 P/N 68504 rev. C L-GAGE(R) LT3 Time-of-Flight Sensor - Retro, Analog/Discrete Theory of Operation A short electrical pulse drives a semiconductor laser diode to emit a pulse of light. The emitted light is collimated through a lens, which produces a very narrow laser beam. The laser beam bounces off the target, scattering some of its light through the sensor's receiving lens to a photodiode, which creates an electrical pulse. The time interval between the two electrical pulses (transmitting and receiving the beam) is used to calculate the distance to the target, using the speed of light as a constant. Multiple pulses are evaluated by the sensor's microprocessor, which calculates the appropriate output value. The analog output provides a variable signal (4 to 20 mA or 0 to 10V dc, depending on model) that is proportional to the target's position within the user-programmed analog window limits. The discrete (switched) output energizes whenever the target is located between the user-programmed discrete window limits. Window limits for the analog and discrete outputs may be the same, or they may be programmed independently. User Interface Emitter Circuitry Microprocessor Time-of-Flight Engine Analog Signal Processing Laser Emitter Lenses Target E R Receiver Element Output Circuitry Figure 1. Theory of operation Programming The L-GAGE LT3 laser sensor has three selectable response speeds and can be programmed in several ways for specific window limits. Response Speed Signal LED Prior to setting window limits, use the sensor's Speed push button to toggle between the three response speed settings. The selected speed will be indicated by one of the three Response Speed indicator LEDs (see Figure 2). See page 5 for further information. Response Speed Indicators SIGNAL FAST MED Sensor Power Up/Laser Enable Allow 30 minutes after power-up to allow the sensor's internal temperature to stabilize, before operating or attempting to program the sensor. If the sensor will be used in applications where the temperature is several degrees higher or lower than ambient, allow the sensor to stabilize in that condition before programming the window limits. (Range will decrease as the sensor warms up.) SPEED Output LED Response Speed Push Button SLOW TEACH Analog Teach LED Analog Output Programming Push Button OUTPUT A D POWER Discrete Teach LED Discrete (switched) Output Programming Push Button Power ON/OFF LED Figure 2. LT3 Time-of-Flight Sensor features The laser enable feature allows the sensor to be continually powered, and enabled only when being used. This eliminates the need for the extended warm-up period between uses. See page 6 for indicator status. The sensor's red Signal LED indicates the condition of the received signal from the object being measured. When programming window limits, this LED must be ON solid (not flashing) for the sensor to accept the setting. To ensure that the received signal will not be marginal during operation, move the target object 300 mm beyond the furthest desired setpoint during setup, and verify that the signal LED is still ON solid. Banner Engineering Corp. * Minneapolis, MN U.S.A. 2 P/N 68504 rev. C www.bannerengineering.com * Tel: 763.544.3164 L-GAGE(R) LT3 Time-of-Flight Sensor - Retro, Analog/Discrete Window Limits Current-Sourcing Models Remote Programming 20 Positive Slope Analog Output (mA) Window limits may be taught to the sensor in several ways, either using the push buttons on the top of the sensor or via a remote switch. To program the sensor remotely or to disable the keypad, the Remote Programming function may be used. Disabling the keypad prevents accidental or unauthorized adjustment of the programming settings. Connect the yellow wire of the sensor to +5 to 24V dc, with a remote programming switch connected between them. NOTE: The impedance of the remote teach input is 55 k. 4 Near Window Far Window Target Position NOTE: The linear analog output tracks slightly past each window limit (from 3.8 to 20.5 mA) Voltage-Sourcing Models 10 Analog Output (V dc) Positive Slope Programming is accomplished by following the sequence of input pulses. The duration of each pulse (corresponding to a push button "click"), and the period between multiple pulses, are defined as "T": 0.04 seconds T 0.8 seconds. Analog Output Slope The L-GAGE LT3 Sensor may be programmed for either a positive or a negative output slope, based on which condition is taught first (see Figure 3). If the near limit is taught first, the slope will be positive; if the far limit is taught first, the slope will be negative. Banner's unique scalable analog output (patent pending) automatically distributes the output signal over the width of the programmed sensing window. In the event of analog signal loss for longer than 2 seconds, the analog output goes to 0V dc or 3.6 mA, which may be used to trigger an alarm. Teaching Analog Limits Using the Auto-Zero Feature (Analog Output) 0 Near Window Far Window Target Position Figure 3. Analog output as a function of target position For some analog applications, a sensing distance set point centered within a sensing window may be required. The TEACH procedure is simple: teaching the same limit twice causes the sensor to program a window centered on the position taught. This window is 10 m wide (taught position 5 m). Teaching Discrete Limits for Background Suppresson For some applications, ignoring objects beyond a certain distance may be required. To suppress the background, place a target object at the selected distance, and teach the position twice. The sensor's discrete output will activate when an object is detected between the sensor's minimum sensing distance and the taught position. NOTE: The sensor allows for some forgiveness in this procedure. If the two limits are not exactly the same (but less than 20 mm apart), the sensor will put the set point at the "average" of the two limits. Banner Engineering Corp. * Minneapolis, MN U.S.A. www.bannerengineering.com * Tel: 763.544.3164 P/N 68504 rev. C 3 L-GAGE(R) LT3 Time-of-Flight Sensor - Retro, Analog/Discrete Teaching Limits for Either Analog or Discrete Output Either output may be programmed first. Push Button Remote Wire 0.04 "click" 0.8 sec. 0.04 sec. T 0.8 sec. Result * Push and hold push button for Analog or Discrete output > 2 seconds* Result * Appropriate TEACH LED turns ON * Sensor is waiting for first limit No action required * TEACH LED flashes * Sensor learns first limit and waits for second limit * Position the target for the first limit** D A D D * Position the target for or the first limit** * "Click" the same push button Analog Output * Double-pulse the remote line D or D A Teach First Limit Procedure or A Programming Mode Procedure T T T T T T T T * Appropriate TEACH LED turns ON then flashes at 2 Hz * Sensor learns first limit and waits for second limit Discrete Output * Single-pulse the remote line T T T T T T T T T T T or D * TEACH LED goes OFF * Sensor learns second limit and returns automatically to RUN mode T T T * Position the target for the second T T T T limit * Single-pulse the remote line T T T T T * Appropriate TEACH LED T T T T T T goesT OFF * Sensor learns second limit and returns automatically to T T T T RUN mode T D A Teach Second Limit A D * Position the target for or the second limit * "Click" the same push button T T T T T T T D A Program Second Output or Repeat for other output, if a second output is desired. * Sensor will return to RUN mode if first TEACH condition is not registered within 120 seconds. ** Press and hold the same push button (or hold the remote line high) > 2 seconds (before teaching the second limit) to exit PROGRAM mode without saving any changes. The sensor will revert to the last saved program. Banner Engineering Corp. * Minneapolis, MN U.S.A. 4 P/N 68504 rev. C www.bannerengineering.com * Tel: 763.544.3164 T L-GAGE(R) LT3 Time-of-Flight Sensor - Retro, Analog/Discrete Teaching Limits for Analog and Discrete Outputs Simultaneously Both Analog and Discrete outputs will have identical limits. Push Button Remote Wire 0.04 "click" 0.8 sec. 0.04 sec. T 0.8 sec. Procedure * Corresponding TEACH LED turns ON Procedure Result No action required or A D or D * Briefly "click" the other button A or * Corresponding TEACH LED turns ON * Sensor is waiting for first limit D A D D Programming Mode * Push and hold either push button for > 2 seconds* Result or D D A D * Position the target for the second limit * "Click" either push button * Both TEACH LEDs go OFF * Sensor learns second limit and returns automatically to RUN mode * Position the target for the first limit** * Triple-pulse the remote line T T T T T T T T T * Position the target for the second T T T T T T T limit * Single-pulse the remote line T T T T T T * Both TEACH LEDs turn ON * Sensor learns first limit and waits for second limit * Both TEACH LEDs flash at 2 Hz, alternating Red and T Green * Both TEACH LEDs go OFF * Sensor learns second limit and returns automatically to RUN mode T T T T D or A Teach Second Limit * Both TEACH LEDs flash at 2 Hz, alternating Red and Green * Sensor learns first limit and waits for second limit D D or or A A Teach First Limit A D * Position theortarget for the first limit** * "Click" either push button T T T T T T T * Sensor will return to RUN mode if first TEACH condition is not registered within 120 seconds. ** Press and hold the same push button (or hold the remote line high) > 2 seconds (before teaching the second limit) to exit PROGRAM mode without saving any changes. The sensor will revert to the last saved program. Sensor Setup Response Speed Use the Speed push button to toggle between the three response speed settings. The selected speed is indicated by one of three Response Speed indicator LEDs (see Figure 2). Discrete Output Response Speed Analog Output Frequency Response (-3dB) Slow 100 ms ON and OFF 2.5 Hz (192 ms average/1 ms update rate) Medium 10 ms ON and OFF 10 Hz (48 ms average/1 ms update rate) Fast 1 ms ON and OFF 114 Hz (6 ms average/1 ms update rate) Banner Engineering Corp. * Minneapolis, MN U.S.A. www.bannerengineering.com * Tel: 763.544.3164 P/N 68504 rev. C 5 L-GAGE(R) LT3 Time-of-Flight Sensor - Retro, Analog/Discrete Push Button Lockout Enables or disables the keypad to prevent accidental or unauthorized adjustment of the programming settings. Procedure Enable/Disable Push Buttons T Result Remote Wire Push Button 0.04 sec. T 0.8 sec. T T * Not available via push button T T T T T * Four-pulse the remote line T T T T T T T * Push buttons are either enabled or disabled, depending on previous condition T T Indicators Power Up/Laser Enable Indicators Selected Response Speed Laser Enable Time * All LEDs turn ON for 1 second Slow 150 ms Medium 60 ms Fast 51 ms When powering up the sensor, the following should occur: * Allow 0.6 second delay for Laser Enable at power up. If sensor is already powered up, see table at right for Laser Enable time. Laser Disable time for all speeds is 50 ms. Signal LED (red) - indicates the strength and condition of the sensor's incoming signal. Signal LED Status Indicates ON Good signal OFF No signal is received, or the target is beyond the range limitations of the sensor (with some tolerance beyond the recommended minimum and maximum sensing distance) Flashing Marginal signal strength (can not teach limits) Output LED (yellow) - lights when a target is sensed within the programmed discrete window limits. Power ON/OFF LED (green) - indicates the operating status of the sensor. Power ON/OFF LED Status Indicates OFF Power is OFF Flashing @ 2Hz Discrete output is overloaded (RUN mode) Flashing @ 1Hz Power ON, Laser is disabled ON Solid Sensor is operating normally (power ON, Laser enabled) Banner Engineering Corp. * Minneapolis, MN U.S.A. 6 P/N 68504 rev. C www.bannerengineering.com * Tel: 763.544.3164 L-GAGE(R) LT3 Time-of-Flight Sensor - Retro, Analog/Discrete Specifications Sensing Range 0.5 to 50 m with BRT-TVHG-8X10P Supply Voltage and Current 12 to 24V dc (10% maximum ripple); 108 mA max. @ 24V dc or [2600/V dc] mA Supply Protection Ciruitry Protected against reverse polarity and transient voltages Delay at Power-up 1 second; outputs do not conduct during this time Sensing Beam 658 nm visible red IEC and CDRH Class 1 laser; 0.15 mW max. radiant output power; (typical laser lifetime 75,000 hours). See Figure 5. Output Protection Protected against short circuit conditions Output Configuration Discrete (switched): SPST solid-state switch; choose NPN (current sinking) or PNP (current sourcing) models Analog output: 0 to 10V dc or 4 to 20 mA Output Rating Discrete (switched) output: 100 mA maximum Off-state leakage current: < 5 A Output saturation NPN: < 200 mV @ 10 mA and < 600 mV @100 mA Output saturation PNP: < 1.2V at 10 mA; < 1.6V at 100 mA Analog voltage output: 2.5 k minimum load impedance Analog current output: 1 k max. @ 24V; max. load resistance = [Vcc-4.5/0.02 ] Output Response Time Discrete output Slow: 100 ms ON and OFF Medium: 10 ms ON and OFF Fast: 1 ms ON and OFF Linearity 60 mm from 0.5 to 50 m (0.12% of full scale) (Specified @24V dc, 22 C using a BRT-TVHG-8X10P retroreflector) Resolution/Repeatability See Figure 4. Discrete Output Hysteresis Fast: 20 mm Medium: 10 mm Slow: 6 mm Temperature Effect < 3 mm / C Minimum Window Size 40 mm Remote Teach Input 18 k minimum (65 k at 5V dc) Remote TEACH To teach: Connect yellow wire to +5 to 24V dc To disable: Connect yellow wire to 0 to +2V dc (or open connection) See Remote Programming on page 3. Adjustments Response speed: Push button toggles between fast, medium, and slow (1 ms, 10 ms and 100 ms discrete; 114 Hz, 10 Hz and 2.5 Hz analog) Window limits (analog or discrete): TEACH-mode programming of near and far window limits (see programming procedure). Limits may also be taught remotely via TEACH input (see page 3). Analog output slope: The first limit taught is assigned to minimum output current or voltage (4 mA or 0V dc). Push-button enable/disable (lockout): via remote line (see page 6) Factory defaults: Slow response speed (100 ms discrete, 2.5 Hz analog) Analog/discrete window limits 0.5 m - 50 m using supplied BRT-TVHG-8X10P target Positive analog slope Push buttons enabled Laser Control Connect red wire to +5 to 24V dc to enable laser beam; connect to 0 to +1.8V dc (or open connection) to disable. See page 6 for delay times on enable. Analog Voltage output (-3 dB) Slow: 2.5 Hz (192 ms average/ 1 ms update rate) Medium: 10 Hz (48 ms average/ 1 ms update rate) Fast: 114 Hz (6 ms average/ 1 ms update rate) Banner Engineering Corp. * Minneapolis, MN U.S.A. www.bannerengineering.com * Tel: 763.544.3164 P/N 68504 rev. C 7 L-GAGE(R) LT3 Time-of-Flight Sensor - Retro, Analog/Discrete Specifications, continued Indicators Green Power ON LED: Indicates when power is ON, overloaded output and laser status Yellow Output LED: Indicates when discrete load output is conducting Red Signal LED: Indicates target is within sensing range and the condition of the received light signal 3 Yellow Speed LEDs: Indicate the response speed setting Red/Green TEACH LEDs: Sensor is in programming mode (red - analog output; green - discrete output) NOTE: See page 6 for more information on indicator behavior. Construction Housing: ABS Window: Acrylic Quick-disconnect: ABS/polycarbonate blend Environmental Rating IP67, NEMA 6 Connections 2 m (6.5') or 9 m (30') shielded 7-conductor (with drain) PVC-jacketed attached cable or 8-pin Euro-style quick-disconnect Operating Conditions Temperature: 0 to +50C (+32 to +122F) Maximum Relative Humidity: 90% at 50C (non-condensing) Application Note Allow 30-minute warm-up before programming or operating (see Sensor Power-up/Laser Enable, page 2) Certifications Resolution/Repeatability vs. Distance LASER LIGHT 20 CLASS 1 LASER PRODUCT RADIANT POWER 0.15mW 10ns PULSE, 1MHz 650 - 670 nm Complies with IEC 60825-1:2001 and 21 CFR 1040.10 & 1040.11 except for deviations pursuant to Laser Notice No. 50, dated July 26, 2001 Resolution/Repeatability (mm) 18 16 Fast 14 12 10 Medium 8 6 4 Slow 2 0 0 10 20 30 Distance (m) 40 50 Figure 4. LT3 resolution/repeatability (retroreflective mode) Class 1 Lasers that are safe under reasonably foreseeable conditions of operation, including the use of optical instruments for intrabeam viewing. Reference 60825-1 Amend. 2 (c) IEC:2001(E), section 8.2. Laser light emitted from this aperture Figure 5. Class 1 laser label and precautions Banner Engineering Corp. * Minneapolis, MN U.S.A. 8 P/N 68504 rev. C www.bannerengineering.com * Tel: 763.544.3164 L-GAGE(R) LT3 Time-of-Flight Sensor - Retro, Analog/Discrete Dimensions 102.7 mm (4.04") D TEACH POWER A MED 75.6 mm (2.98") 5.9 mm (0.23") 87.0 mm (3.43") SLOW FAST 35.3 mm (1.38") SPEED OUTPUT 86.9 mm (3.42") SIGNAL Mounting Hardware: M4 x 0.7 x 40 socket-head cap screw M4 x 0.7 hex nut with captured toothed lock washer M3 short arm hex key p priate Teach button untill Teach 1. Press and hold appro light turns ON. RADIANT POWER 0.5mW 10ns PULSE, 1MHz 650 - 670nm COMPLIES TO 21 CFR PART 1040.10 AND EN60825-1:1994 Avoid exposure-laser light emitted from this aperture 40.6 mm (1.59") 2. Adjust target to 1st limit point. Press Teach button. (Teach flas shes.) bn bu wh 3. gn Press Teach button. . (Teach turns OFF.) + - 12-24V dc 4-20mA gy Discrete Load 68.5 mm (2.70") 48.8 mm (1.92") LT3NIQ rd Laser Control 5-24V dc ye Teach 5-24V dc Shield L-GAGETM 19.5 mm (0.76") 5.2 mm (0.20") 15.0 mm (0.59") 2x o4.5 mm (0.18") C'sink o7.3 mm (0.29"), 5.3 mm (0.21") deep Hookups NPN Analog Current bn bu wh + - 12-24V dc + 4-20mA gn - gy Discrete Load rd Laser Control ye Teach 5-24V dc 5-24V dc PNP Analog Current bn bu wh + - 12-24V dc + 4-20mA gn - gy Discrete Load rd Laser Control ye Teach Shield 5-24V dc 5-24V dc Shield NPN Analog Voltage PNP Analog Voltage bn bu wh + bn bu wh + + - 12-24V dc 0-10V + - 12-24V dc 0-10V gn - gy Discrete gn - gy Discrete rd Laser Control 5-24V dc ye Teach 5-24V dc rd Laser Control 5-24V dc ye Teach 5-24V dc Load Shield Load Shield NOTE: Hookups for QD models are functionally identical. Banner Engineering Corp. * Minneapolis, MN U.S.A. www.bannerengineering.com * Tel: 763.544.3164 P/N 68504 rev. C 9 L-GAGE(R) LT3 Time-of-Flight Sensor - Retro, Analog/Discrete Accessories Euro-Style Quick-Disconnect Cables Cable: PVC jacket, polyurethane connector body, chrome-plated brass coupling nut Conductors: 24 AWG high-flex stranded, PVC insulation, gold-plated contacts Temperature: -40 to +105C (-40 to +221F) Voltage Rating: 30V ac/36V dc Style Model Length MQDC-806 MQDC-815 MQDC-830 8-Pin Euro Straight Connector 2 m (6.5') 5 m (15') 9 m (30') Pinout (Female View) 14.2 mm (0.56") M12 X 1 Gray Red or Pink Blue Yellow White Green 42.0 mm (1.65") Brown Shield Retroreflective Tape Model Size BRT-TVHG-8X10P 203 x 254 mm (8" x 10") NOTE: Retroreflective material has a pressure-sensitive adhesive. For maximum adhesion, surfaces must be clean and dry before applying. For best results, use full-size; target may be trimmed as necessary. Mounting Brackets * Right-angle bracket * 300 series stainless steel SMBLT31 8.0 mm (0.31") 20.5 mm (0.81") 24.1 mm (0.94") 2x R2.5 (0.10") 5.0 13.0 mm (0.51") 10.0 o5.0 mm (0.20") R89.6 mm (3.53") 2x o4.0 mm (0.16") R47.5 mm (1.87") R172 mm (6.77") 33.5 31.5 2x R2.5 (0.10") 68.0 mm (2.67") o5.0 mm (0.20") 14.0 mm (0.55") 13.0 mm (0.51") 65.0 mm (2.56") 85.5 mm (3.36") 5.0 mm (0.20") 32.0 mm (1.26") Banner Engineering Corp. * Minneapolis, MN U.S.A. 10 P/N 68504 rev. C www.bannerengineering.com * Tel: 763.544.3164 L-GAGE(R) LT3 Time-of-Flight Sensor - Retro, Analog/Discrete Mounting Brackets * Heavy-duty protective bracket * 304 series stainless steel * Mounting hardware included SMBLT32 16.0 mm (0.63") 8.5 mm (0.33") 5 45.2 mm (1.79") 65.0 mm (2.56") CL 4x R5.0 mm (0.20") 355.2 CL 55.0 mm (2.16") 72.0 mm (2.83") 28.0 mm (1.10") 35.0 mm (1.38") 16x R2.5 mm (0.09") 22.0 mm (0.87") 17.0 mm (0.67") 19.0 mm (0.74") R 89.6 mm (3.52") o28.0 mm (1.10") 33 70.0 mm (2.75") 32 5.0 mm (0.20") 2x o5.0 mm (0.20") 20.89 mm (0.822") 19.2 mm (0.76") 6.0 mm (0.24") 90.0 mm (3.53") R5.5 mm (0.22") 12.3 mm (0.48") * Replaceable windows for welding environments * Stainless steel construction * Includes 2 weld-resistant windows SMBLT3IP 12.7 mm (0.50") 89.6 mm (3.53") O 4.5 mm (0.18") 107.9 mm (4.25") 2 X 29.7 mm (1.18") 41.4 mm (1.63") 115.0 mm (4.50") 130.5 mm (5.11") 2 X 55.9 mm (2.20") 10 20 31.2 mm (1.23") 56 42.9 mm (1.69") 2.7 mm (0.10") 82.5 mm (3.25") 14.5 mm (0.57") 20 4 X R 3.3 mm (0.13") 54.1 mm (2.13") Banner Engineering Corp. * Minneapolis, MN U.S.A. www.bannerengineering.com * Tel: 763.544.3164 P/N 68504 rev. C 11 L-GAGE(R) LT3 Time-of-Flight Sensor - Retro, Analog/Discrete WARRANTY: Banner Engineering Corp. warrants its products to be free from defects for one year. Banner Engineering Corp. will repair or replace, free of charge, any product of its manufacture found to be defective at the time it is returned to the factory during the warranty period. This warranty does not cover damage or liability for the improper application of Banner products. This warranty is in lieu of any other warranty either expressed or implied. P/N 68504 rev. C Banner Engineering Corp., 9714 Tenth Ave. No., Minneapolis, MN 55441 * Phone: 763.544.3164 * www.bannerengineering.com * Email: sensors@bannerengineering.com