E3M-42D-IT

E3M-42D-IT Suggested applications
  • Hot water suppliers (oil, gas)
  • Coffeemakers
  • Electric water heaters
  • Bathroom dryers
  • CO2 hot water suppliers (heat pump type)
  • Dishwashers
  • Bathtub temperature sensor
  • Clothes washers
  • Hot-water heating systems
  • Toilets with built-in seat heater and wash unit

    Advantages
    Fast thermal response
    Corrosion resistance of SUS316L protecting pipe
    Moisture resistance of type NSII tightly sealed thermistor
    Compact size of sensor section

    Shape and dimensions:
    E3M-42D-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 = 3.485kΩ ±2.5% (at 50℃)
    B constantB = 3450K ±1% (between 0℃ and 100℃)
    Insulation resistanceover 100MΩ at 500V DC (between protecting pipe and lead wire)
    Dielectric strength750V AC for one second (cut-off current 0.5mA, at room temperature, between protecting pipe and lead wire)
    Thermal responseless than 2.0 seconds (90% achievement of resistance value from 0℃ to 50℃, in agitated water)
    Thermal dissipation constantσ = approximately 4.6mW/℃ (in moving water)
    Maximum power consumption10mW (at 25℃)
    Operating temperature rangebetween -20 and +120℃
    Download R/T table for E3M-42D-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 2. Environmental resistance tests, the piece is left in room ambient for 2 hours, then measured.
  • operations cannot be guaranteed if the following parameters are exceeded
    • 1. Mechanical strength tests
    Natural drop testthree free drops from a height of 1.5m to concrete floor
    Tensile strength test (sensor side)protecting pipe is fixed; 30N straight pulling force is applied to the lead wires (two wires together) for 3 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 twice
    Vibration test (thermistor is fixed to a vibration tester for the following tests)JIS C 0040 (1987) Frequency range: 100 to 2000Hz
    One side amplitude or acceleration: One-side amplitude is 0.75mm, or acceleration is 98m/s2, whichever is smaller
    Sweep cycle: 10 cycles
    Test period: X, Y, Z for 1.5 hours in each direction
    Pressure test4.9MPa of air pressure for 1 minute
    2. Environmental resistance tests
    Heat resistance24 hours at 200℃ ±5℃ ambient temperature (from tip of protecting pipe to below support ring)
    Moisture resistance96 hours in the air at 60℃ ±2℃, relative humidity 90 to 95%
    Hot water test6 hours in 2.5 liters of water at 80℃, then cooled naturally for 16 hours (from tip of protecting pipe to below support ring)
    Hot loading test250 hours in air at 120℃ ±5℃ while consuming 10mW
    Heat cycle test500 cycles of the following test (from tip of protecting pipe to below support ring):
    Air at room temperature to 2 minutes in water at 5℃ ±5℃ to air at room temperature to 2 minutes in water at 98℃ ±5℃ (from tip of protecting pipe to below support ring)
    Thermal shock test3,000 cycles of the following test (from tip of protecting pipe to below support ring):
    Air at room temperature to 10 minutes in oil at 0℃ ±2℃ to air at room temperature to 10 minutes in oil at 150℃ ±5℃
    Test criteria:
    In 1. Mechanical strength tests, there must be no open circuits, short circuits or deformation
    In 2. Environmental resistance tests, the change of resistance and B constants ratios must be ≤ 2%; insulation resistance and dielectric strength must meet all specified values (however, in the Hot Loading Test only insulation resistance criteria apply)


    Instructions for handling, installation and use of thermistors
    Please carefully follow these instructions to avoid damage to and/or faulty operation of 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. Ensure that the thermistor is not placed into the mouth or eyes; keep away from children and pets.
    4.Use of thermistors in the following conditions may degrade thermistor function or lifespan; the customer must make their own checks of performance and reliability:
  • 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
    • 5.When disposing of thermistors, treat them as industrial waste and observe all applicable laws and regulations.
    6.Proper seating of the thermistor in the device in which it is to be used must be carefully observed by the customer.


     
    Shibaura Electronics Co., Ltd.