E3LM-51F-IT

E3LM-51F-IT Suggested applications
  • Toilets (with seat heaters and washer units)
  • Electric water heaters
  • Temperature sensors pods or jars
  • Hot-water heating systems

    Advantages
  • Corrosion resistance of SUS316L protecting pipe
  • Moisture resistance of type NSII tightly sealed thermistor
  • Long protecting pipe allows for interior temperature sensing of contents

    Shape and dimensions:
    E3LM-51F-IT
    Lot mark
    Indicated in black, using last figures of years and month.
    (note: October, November and December are shown as X, Y and Z)
    Example: "41" means manufactured in January of 2004


    Specifications:
    ResistanceR = 29.37kΩ ±2.5% (at 37℃)
    B constantB = 3970K ±2% (between 0℃ and 100℃
    Insulation resistanceOver 100MΩ at 500V DC(heat sensing portion in water, between water and lead wires)
    Dielectric strength500V AC for 1 minute (cut-off current 0.5mA, at room temperature, between protecting pipe and lead wire)
    Thermal time constantτ = less than 5 seconds (in agitated water)
    Thermal dissipation constantσ = approx. 1.9mW/℃ (in still air)
    Maximum power consumption1mW (at 25℃)
    Operating temperature range-0℃ to +50℃
    Download R/T table for E3LM-51F-IT


    Reliability testing: other rating
  • Test method is subject to JIS C 2570
  • After the test, the unit is left in room ambient for 1 hour, then measured. However, in moisture resistance test, the piece is left in room ambient for 2 hours, then measured.
  • Normal operations cannot be guaranteed if the following parameters are exceeded
    • 1. Mechanical strength tests
    Natural drop testthree free drops from a height of onto a 15 x 15cm oak board 3 cm or thicker
    Tensile strength test (sensor side)protecting pipe is fixed; 30N straight pulling force is applied to the lead wires (two wires together) for 30 seconds.
    Lead wire bending testprotecting pipe is fixed; 1N force is applied to lead wires: 90° to the right for 5 seconds, then 90° to the left for 5 seconds, repeated five times
    Vibration test (thermistor is fixed to a vibration tester for the following tests) Frequency range: 10 to 500Hz
    Full amplitude or acceleration: acceleration of 98m/s2 (10G)
    Sweep frequency: 10 to 500 to 10Hz, 15 minutes
    Sweep method: constant sweep
    Test period: X, Y, Z for 2 hours in each direction
    2. Environmental resistance tests
    Heat resistance1,000 hours at 80℃ ±2℃ ambient temperature
    Moisture resistance240 hours in the air at 40℃ ±2℃, relative humidity 90 to 95%
    Heat cycle test25 cycles of the following test:
    Air at room temperature to 30 minutes in air at 25℃ ±5℃ to 3 minutes in air at room temperature to 30 minutes in air at 85℃ ±3℃ to 3 minutes in air at room temperature
    criteria for acceptabirity:
    In 1. Mechanical strength tests, there must be no change in electrical characteristics or appearance (cut wire, shorting, deformation)
    In 2. Environmental resistance tests, change ratio of resistance and B constant must be within 2% of the initial figures; insulation resistance and dielectric strength must meet standards


    Instructions for handling, installation and use of thermistors
    Please carefully follow these instructions to avoid damage and/or faulty operation of the thermistors:
    1.Never exceed maximum rated power.
    2.When the thermistor is used as a sensor for the control of a device, be sure to incorporate appropriate safety measures to prevent accidents, such as a separate safety circuit or back-up sensor.
    3.If the thermistor will be exposed within the device, an instruction to end users warning that the thermistor must not be touched must be included.
    4.Ensure that the thermistor is not placed into the mouth or eyes; keep away from children and pets.
    5.Use of thermistors in the following conditions may degrade thermistor function or lifespan; the customer must make their own checks of performance and reliability:
  • Presence of corrosive gases, such as C12, NH3, SOx, NOx
  • Environment with high electric conductivity, such as electrolytes, water, saltwater, etc.
  • Presence of acids, alkalis or organic solvents
  • Dusty or dirty environments
  • When thermistors are resin sealed or resin coated
    • 6.The terminal section (housing) must be kept from condensation or other moisture; failure to do son may result in improper functioning or damage.
    7.Proper seating of the thermistor in the device in which it is to be used must be carefully observed by the customer.
    8.When disposing of thermistors, treat them as industrial waste and observe all applicable laws and regulations.


     
    Shibaura Electronics Co., Ltd.