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. 316L SS Pressure Sensor with PVC Threads Small Profile 4.5V (typ) High Level Output Gage, Absolute, Sealed Gage ASIC Calibrated Variety of Cable Lengths Applications Irrigation Features RV and Marine Holding Tank Level Threaded Process Fitting Water Storage & Recycling Systems -20C to +70C Operating Temperature Small Tank Fluid Level 1% Accuracy Chillers & Evaporative Coolers 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) Range (Bar) Gage Absolute Sealed Gage 0 to 1 0 to .07 0 to 2 0 to .20 0 to 5 0 to .35 0 to 15 0 to 1 0 to 30 0 to 2 0 to 50 0 to 5 0 to 100 0 to 7 0 to 150 0 to 10 Note: Intermediate pressure ranges available. PERFORMANCE SPECIFICATIONS Supply Voltage: 5.0Vdc Ambient Temperature: 25C (unless otherwise specified) PARAMETERS MIN TYP MAX UNITS NOTES Zero Pressure Output 0.5 V 1, 2 Full Scale Output 4.5 V 1 Accuracy (combined linearity, hysteresis, & repeatability) -1 +1 %Span 3 Total Error Band (includes calibration errors above & temperature effects over the -3 +3 %Span compensated range) Supply Voltage 4.75 5.00 5.25 V Insulation Resistance (50Vdc) 50 M 4 Pressure Overload 3X Rated 5 Pressure Burst 4X Rated 6 Compensated Temperature 0 40 C Operating Temperature -20 +70 C Tightening Torque (recommended) 1~2 Turns from Finger Tight 7 Zero Offset Effect 1psiG from 90 Changes due to 0.6 %Span 8 Installation Orientation Media, Pressure Port Liquids and Gases compatible with PVC, 316/316L ST STL, Buna-N O-Ring Notes 1. Ratiometric to supply voltage. 2. Measured at vacuum for Absolute (A), ambient for Gage (G) and Sealed Gage (S). 3. Best fit straight line. 4. Minimum from any wire to metal diaphragm. 5. The maximum pressure that can be applied without changing the transducers performance or accuracy 6. The maximum pressure that can be applied to a transducer without rupture of either the sensing element or transducer. 7. 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. 8. 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