LM LIQUID LEVEL SENSOR The LM series liquid level sensor incorporates stainless steel and plastic isolation suitable for level sensing in water and other liquids. The LM uses a patented low-cost stainless-steel sensor in a PVC plastic fitting to measure liquid level based on the specific gravity of the liquid and the height of the tank or container. The modular design is adaptable to an infinite number of plastic port variations for OEM applications. With high performance in a small form factor, the LM Series enables the miniaturization of high accuracy pressure systems. The standard output is 0.5-4.5V ratiometric with a 5V supply. Irrigation RV and Marine Holding Tank Level Water Storage & Recycling Systems Small Tank Fluid Level Chillers & Evaporative Coolers Small Profile 4.5V (typ) High Level Output ASIC Calibrated Applications 316L SS Pressure Sensor with PVC Threads Gage, Absolute, Sealed Gage Variety of Cable Lengths Features Threaded Process Fitting -20C to +70C Operating Temperature 1% Accuracy 3.0% Total Error Band Solid State Reliability Variety of Cable Lengths TE CONNECTIVITY SENSORS /// LM 12/2019 Page 1 LM SERIES LIQUID LEVEL SENSOR STANDARD RANGES Range (psi) 0 to 1 0 to 2 0 to 5 0 to 15 0 to 30 0 to 50 0 to 100 0 to 150 Range (Bar) 0 to .07 0 to .20 0 to .35 0 to 1 0 to 2 0 to 5 0 to 7 0 to 10 Gage Absolute Sealed Gage Note: Intermediate pressure ranges available. PERFORMANCE SPECIFICATIONS Supply Voltage: 5.0Vdc Ambient Temperature: 25C (unless otherwise specified) PARAMETERS UNITS NOTES Zero Pressure Output MIN TYP 0.5 MAX V 1, 2 Full Scale Output 4.5 V 1 3 Accuracy (combined linearity, hysteresis, & repeatability) -1 +1 %Span Total Error Band (includes calibration errors above & temperature effects over the compensated range) -3 +3 %Span Supply Voltage 4.75 Insulation Resistance (50Vdc) 5.00 5.25 50 V M 4 Pressure Overload 3X Rated 5 Pressure Burst 4X Rated 6 0 40 C -20 +70 C Compensated Temperature Operating Temperature Tightening Torque (recommended) 1~2 Turns from Finger Tight Zero Offset Effect @ 1psiG from 90 Changes due to Installation Orientation Media, Pressure Port 0.6 7 %Span 8 Liquids and Gases compatible with PVC, 316/316L ST STL, Buna-N O-Ring Notes 1. 2. 3. 4. 5. 6. 7. 8. Ratiometric to supply voltage. Measured at vacuum for Absolute (A), ambient for Gage (G) and Sealed Gage (S). Best fit straight line. Minimum from any wire to metal diaphragm. The maximum pressure that can be applied without changing the transducer's performance or accuracy The maximum pressure that can be applied to a transducer without rupture of either the sensing element or transducer. Over-torquing will damage the PVC fitting and will cause sensor calibration and/or zero offset to shift during installation. Always check for a zero-offset shift after installing. Zero offset effect is inversely ratiometric to pressure range, for 2psiG: 0.3% Span (typ); for 5psiG: 0.12% Span (typ). Additional Notes 9. Standard gage units are not recommended for vacuum applications. 10. Direct mechanical contact with diaphragm is prohibited. Diaphragm surface must remain free of defects (scratches, punctures, dents, fingerprints, etc.) for device to operate properly. Caution is advised when handling parts with exposed diaphragms. Use protective cap whenever devices are not in use. TE CONNECTIVITY SENSORS /// LM 12/2019 Page 2 LM SERIES LIQUID LEVEL SENSOR DIMENSIONS TE CONNECTIVITY SENSORS /// LM 12/2019 Page 3 LM SERIES LIQUID LEVEL SENSOR ORDERING INFORMATION LM Model LM 3 Output Signal 3* = 0.5 - 4.5V Ratiometric X = Special 1 - 00000 Connection Type - 00000 Dim `L' Cable Inches [mm] - 00000 F Pressure Port F = 1/2-14 NPT X = Special - 100P - Pressure Range Pressure Type 001P** 002P** 005P 015P 030P 050P 100P 150P G = Gage A = Absolute S = Sealed Gage - 1 = 12 0.25 [305 6.4] 2 = 24 0.5 [610 12.7] 3 = 48 1.0 [1219 25.4] 4 = 84 1.5 [2134 38.1] 5 = 120 1.5 [3048 38.1] 6 = 180 2.0 [4572 50.8] 7 = 360 2.0 [ 9144 50.8] .07B** .20B** .35B 001B 002B 005B 007B 010B G *Note: Ratiometric output span changes with input voltage. (See supply voltage specification) **Note: 1psi (.07Bar) and 2psi (.20Bar) only available in Gage (G). (See standard rages) NORTH AMERICA EUROPE Measurement Specialties, Inc., a TE Connectivity Company Tel +1 800 522 6752 customercare.frmt@te.com Measurement Specialties (Europe), Ltd., a TE Connectivity Company Phone: +31 73 624 6999 Email: customercare.lcsb@te.com ASIA Measurement Specialties (China), Ltd., a TE Connectivity Company Phone: +86 0400-820-6015 Email: customercare.shzn@te.com TE.com/sensorsolutions Measurement Specialties, Inc., a TE Connectivity company. Measurement Specialties, TE Connectivity, TE Connectivity (logo) and EVERY CONNECTION COUNTS are trademarks. All other logos, products and/or company names referred to herein might be trademarks of their respective owners. The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable. However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity`s obligations shall only be as set forth in TE Connectivity`s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. (c) 2018 TE Connectivity Ltd. family of companies TE CONNECTIVITY SENSORS /// LM All Rights Reserved. 12/2019 Page 4