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Fire Alarm Temperature Detection Equipment Temperature Sensor Thermistor Chip Radial NTC 10KOhm 3470

Categories NTC Thermistor
Brand Name: Aolittel
Model Number: CWFD0103FB-240CP
MOQ: 1000PCS
Price: Negotiable
Payment Terms: T/T, Western Union, MoneyGram,Paypal
Supply Ability: 7,000,000 Pieces Per Month
Delivery Time: 7 Workdays
Packaging Details: Bulk
Product Type: Radial NTC Thermistor Chip 10KOhm 3470
R25: 10KΩ±1%
B25/50: 3470K±1%
Encapsulation: Epoxy Resin
Lead Wire: Stents
Dissipation Factor: 0.9mW/C
Response Time: 15 sec
Maximum rated power: 25mW
Operating Temperature: -40~+125C
Color: Black
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    Fire Alarm Temperature Detection Equipment Temperature Sensor Thermistor Chip Radial NTC 10KOhm 3470


    Fire Alarm Temperature Detection Equipment Temperature Sensor Thermistor Chip Radial NTC 10KOhm 3470


    Features


    Temperature sensor designs according to device of firealarm
    Chip of it is Shibaura NTC thermistor
    Epoxy coated so it can resist humidity
    Good coherence and stability,high humidity and durability
    Enjoys a large sale in China, America and Japan


    __________________________________________________________________________Epoxy Coated Photocell 11mm Diameter Photoresistor Light Sensor GM11528 With Light Resistance 10-20 KOhm Download________


    Dimension (mm)



    Material


    NOMaterial NameItem/PN
    1.ElementR25=10KΩ±1% B25/50=3470K±1%
    2.CoatingResin (Black)
    3.Lead WireStents

    Electrical Performances


    NOItemSignTest ConditionsMin.Normal valueMax.Unit
    1.Resistance at 25℃R25

    Ta=25±0.05℃

    PT≦0.1mw

    9.910.010.1
    2.B ValueB25/503435.334703504.7k
    3.Dissipation factorσTa=25±0.5℃≧0.9mW/℃
    4.Time constantτTa=25±0.5℃≦15sec
    5.Maximum rated powerP/≦25mW
    6.Operating temp.range//-40/+125

    Reliability Test


    NOItemTechnical requirementsTest conditions and method
    1.WeldabilitySolder coating area is over 95%Temperature: 260℃±5℃, Time: ≤Sec
    2.Resistance To Soldering HeatR25 △R/R≤±3%Tin stove temperature: ≤260±5℃, Immersion depth is ≥9mm distance far away with body, Time: ≤3Sec
    3Steady State TemperaturR25 △R/R≤±3%Temperature:40±3℃; Humidity:90-98%, Time:300H
    4Temp. cycle testR25 △R/R≤±3%–20±3℃×30min 120±3℃×30min×50 cycles
    5.High temperature storageR25 △R/R≤±3%Temperature:120±3℃; Time:300H
    6Low temperature storageR25 △R/R≤±3%Temperature:-20℃; Time:300H
    7Drop testNo visible damageFree fall into concrete floor from height 1M ,5 cycle.
    8Bending testBend 90°binding site wire and epoxy resin.Back and forth 3 times
    9Tensile testsFixed resistors at both ends ,Pull: 10±1N, Time: 10±1 Sec

    Resistance Vs. Temperature Table


    R-T CONVERSION TABLE
    R25=10KΩ±1% B25/50=3470K±1%
    T(℃)R↓(%)Rmin (KΩ)Rcen (KΩ)Rmax (KΩ)R↑(%)
    -40-4.094222.2558231.7438241.46074.193
    -39-4.037209.6808218.502227.53114.132
    -38-3.98197.8985206.1023214.49484.072
    -37-3.924186.8541194.4861202.28944.012
    -36-3.868176.4971183.5991190.85663.953
    -35-3.813166.7797173.3905180.14243.894
    -34-3.757157.6592163.8144170.09773.836
    -33-3.703149.095154.8275160.67633.778
    -32-3.648141.0496146.3899151.83563.72
    -31-3.594133.4886138.4647143.53653.663
    -30-3.54126.38131.018135.74273.606
    -29-3.487119.7408124.0667128.47133.55
    -28-3.434113.4893117.5251121.63223.495
    -27-3.381107.601111.3668115.19733.44
    -26-3.329102.0526105.5671109.14033.385
    -25-3.27796.8223100.103103.43683.33
    -24-3.22691.890494.953398.06433.276
    -23-3.17487.238190.098193.00173.223
    -22-3.12382.847885.518888.22923.169
    -21-3.07378.703481.198283.72873.116
    -20-3.02274.789777.120379.48313.064
    -19-2.97271.102873.280775.48773.012
    -18-2.92267.617969.653371.7152.96
    -17-2.87364.322666.225168.15122.908
    -16-2.82361.205662.983964.78362.857
    -15-2.77458.256659.91961.60062.807
    -14-2.72655.465557.019758.59122.756
    -13-2.67752.82354.276155.74472.706
    -12-2.62950.320251.678953.05152.656
    -11-2.58147.949449.219850.50272.606
    -10-2.53345.702646.890548.08962.557
    -9-2.48643.595644.707245.82882.509
    -8-2.4441.595242.635343.68442.461
    -7-2.39339.695840.66941.65022.413
    -6-2.34737.891738.802339.722.365
    -5-2.30136.177637.029537.88772.318
    -4-2.25534.548735.345636.14822.271
    -3-2.20933.000433.745834.49622.224
    -2-2.16331.528332.225432.9272.177
    -1-2.11830.128430.780331.43612.131
    0-2.07328.796529.40630.0192.084
    1-2.02627.486528.05528.62652.037
    2-1.9826.245226.775427.30821.99
    R-T CONVERSION TABLE
    R25=10KΩ±1% B25/50=3470K±1%
    3-1.93425.068525.562926.05961.943
    4-1.88923.952824.413924.87691.897
    5-1.84322.894523.324523.75611.851
    6-1.79821.890122.29122.69331.805
    7-1.75420.936821.310521.68551.759
    8-1.70920.031420.379820.72921.714
    9-1.66519.171519.496219.82181.67
    10-1.62218.354118.656718.961.626
    11-1.57817.577417.859318.14181.582
    12-1.53516.838717.101217.36421.538
    13-1.49216.136216.380616.62541.495
    14-1.4515.467515.69515.92291.452
    15-1.40714.831115.042815.25481.409
    16-1.36614.225214.422114.61921.367
    17-1.32413.647813.830914.01411.325
    18-1.28213.098113.268213.43851.283
    19-1.24112.57412.73212.89011.242
    20-1.212.074312.22112.36771.201
    21-1.1611.597711.733811.86991.16
    22-1.11911.143211.269411.39561.12
    23-1.07910.709410.826310.94321.079
    24-1.0410.295410.403510.51171.04
    25-19.91010.11
    26-1.0399.51499.61489.71471.039
    27-1.0789.14819.24789.34751.078
    28-1.1178.79788.89728.99661.117
    29-1.1558.46318.5628.66091.155
    30-1.1938.14358.24188.34021.194
    31-1.2317.83757.93528.03291.232
    32-1.2697.54537.64227.73921.269
    33-1.3067.26557.36167.45781.307
    34-1.3436.9987.09337.18861.344
    35-1.386.7426.83636.93071.381
    36-1.4166.49666.58996.68331.418
    37-1.4526.2626.35436.44671.454
    38-1.4886.03716.12836.21971.491
    39-1.5245.82175.91186.00211.527
    40-1.565.61515.70415.79331.563
    41-1.5955.41735.50515.59311.599
    42-1.635.22765.31425.4011.634
    43-1.6655.04575.13115.21681.669
    44-1.74.87114.95535.03981.705
    45-1.7344.70374.78674.871.739
    46-1.7684.5434.62484.70691.774

    R-T CONVERSION TABLE
    R25=10KΩ±1% B25/50=3470K±1%
    47-1.8024.38884.46934.55011.809
    48-1.8364.24074.324.39961.843
    49-1.8694.09834.17644.25481.877
    50-1.9033.96194.03874.11591.911
    51-1.9363.82793.90353.97941.945
    52-1.973.69913.77343.84811.979
    53-2.0033.57523.64833.72182.013
    54-2.0363.45613.52793.60012.047
    55-2.073.34133.41193.48292.081
    56-2.1023.23093.30033.37012.115
    57-2.1353.12453.19273.26132.148
    58-2.1683.02223.08923.15662.182
    59-2.22.92372.98953.05572.215
    60-2.2322.82892.89352.95852.248
    61-2.2652.73742.80082.86472.281
    62-2.2972.64932.71162.77432.314
    63-2.3282.56452.62562.68722.346
    64-2.362.48262.54262.60312.379
    65-2.3922.40372.46262.5222.411
    66-2.4232.32772.38552.44382.443
    67-2.4542.25432.3112.36822.476
    68-2.4852.18362.23932.29552.508
    69-2.5162.11542.172.22512.54
    70-2.5472.04952.10312.15722.571
    71-2.5781.98612.03872.09182.603
    72-2.6081.92491.97642.02852.635
    73-2.6391.86561.91621.96732.666
    74-2.6691.80861.85821.90832.697
    75-2.6991.75361.80221.85142.728
    76-2.7291.70031.7481.79622.759
    77-2.7591.64891.69571.7432.79
    78-2.7891.59921.64511.69152.821
    79-2.8181.55141.59641.64192.852
    80-2.8481.50511.54921.59392.882
    81-2.8771.46021.50351.54732.913
    82-2.9061.4171.45941.50242.943
    83-2.9351.37531.41691.4592.973
    84-2.9641.33481.37561.41693.004
    85-2.9931.29581.33581.37633.033
    86-3.0221.25751.29671.33643.064
    87-3.0511.22041.25881.29773.094
    88-3.081.18481.22241.26063.124
    89-3.1091.151.18691.22433.154
    90-3.1371.11651.15271.18943.184

    R-T CONVERSION TABLE
    R25=10KΩ±1% B25/50=3470K±1%
    91-3.1661.0841.11941.15543.214
    92-3.1941.05271.08741.12273.244
    93-3.2231.02241.05641.0913.273
    94-3.2510.9931.02641.06033.303
    95-3.2790.96450.99721.03043.332
    96-3.3070.9370.9691.00163.362
    97-3.3350.91020.94160.97353.391
    98-3.3630.88440.91520.94653.42
    99-3.3910.85940.88960.92033.449
    100-3.4180.83530.86490.8953.478
    101-3.4460.81170.84070.87023.507
    102-3.4730.78890.81730.84623.536
    103-3.50.7670.79480.82313.565
    104-3.5280.74570.7730.80083.593
    105-3.5550.7250.75170.77893.622
    106-3.5820.70490.73110.75783.65
    107-3.6090.68550.71120.73743.679
    108-3.6360.66660.69180.71743.707
    109-3.6620.64840.67310.69823.735
    110-3.6890.63080.6550.67963.763
    111-3.7150.61380.63750.66173.791
    112-3.7420.59710.62030.6443.819
    113-3.7680.5810.60380.6273.847
    114-3.7940.56540.58770.61053.875
    115-3.820.55030.57220.59453.902
    116-3.8470.53550.55690.57883.93
    117-3.8730.52120.54220.56373.958
    118-3.8990.50730.52790.54893.985
    119-3.9240.4940.51420.53484.012
    120-3.950.48090.50070.52094.04
    121-3.9760.46820.48760.50744.067
    122-4.0010.45590.47490.49434.094
    123-4.0270.4440.46260.48174.121
    124-4.0520.43250.45080.46954.148
    125-4.0770.42120.43910.45744.175
    Thermistor – Temperature Detection Fire Alarm Example
    Thermistors serve a crucial role in temperature detection. For example, thermistor temperature detection can be used in fire alarms to detect fires based on a sudden change in temperature. Unlike photoelectric detectors or ionization alarms, thermistors only require heat to activate.
    Photoelectric and Ionization Fire Alarms

    The photoelectric detector requires heavy smoke or a smoldering fire to work properly. Heavy smoke from a fire enters a chamber in the alarm with a LED light. The smoke will then deflect light onto a photoelectric sensor, activating the alarm. The complex circuitry and required chamber increases manufacturing price.
    Although the ionization method in a fire alarm is effective in alerting those around it in the case of hot blazing fires, it is also sensitive to dust or steam which causes false alarms. units will either be disabled or removed completely by annoyed owners due to so many false alarms.The disabling and removal of the fire alarms increases the risk of bodily harm. The radioactive nature of ionization alarms requires proper disposal when the alarms are no longer working. Just like photoelectric detectors, the circuitry in an alarm utilizing the ionization method requires complex circuitry, making this alarm costly. The most cost effective fire alarm is one utilizing the thermistor method.
    Thermistor Temperature Detection in Fire Alarms

    The thermistor method, unlike the previous examples, uses heat detection to activate. The alarm activates once the thermistor detects a high temperature. Thermistor temperature detection doesn’t require smoke to activate and has fewer false alarms. The thermistor uses the ambient temperature of a building and will only activate when that temperature increases exponentially. The thermistor method is reliable in this fire alarm example as there would be few false alarms and a quicker alert rate, but the thermistor method is also versatile.
    Versatility with Thermistor Temperature Detection

    Thermistors as temperature detectors are versatile in the fire alarm example because of the many placement options available. Thermistor fire alarms can be placed in
    • areas with high steam, such as used in dairy factories
    • Incineration and oven rooms where smoke usually gathers
    • rooms with high temperatures like welding workshops
    • industrial workplaces with a lot of dust and smoke
    With strategic placing, the thermistor method would not cause unnecessary alarms, while still being reliable in the industrial workplace to ensure all employees reach safety when a threat of fire occurs. Thermistors can activate at specific temperatures. The fine tuning allows for even greater versatility in their placement.
    Thermistor Temperature Detection for Homes

    Data compiled and published by www.usfa.fema.gov show the numbers on residential fires and their causes from 2009 to 2011. The connections behind outlets in the wall cause about nine percent of all residential fires. Although not a high number comparatively, it is another place a thermistor temperature detection type fire alarm would prove beneficial. The thermistor used for temperature detection is so tiny that an alarm could be manufactured small enough to be placed behind electrical outlets. Should a high temperature occur in the outlet creating a fire danger, the alarm would alert those around to shut the power off or could shut off power automatically.

    Lower Cost of Thermistor Alarms

    Production of a fire alarm utilizing the thermistor temperature detection method is more cost effective because of the simple circuitry and easy construction. The alarms require one part for manufacturing, rather than multiple complex parts. The thermistor doesn’t contain hazardous material, allowing for easy disposal when the alarm is no longer working.
    Thermistors used in temperature detection are versatile and cost effective pieces of circuitry. In our example of fire alarms, we have seen that they are more cost effective due to simple circuitry, have fewer false alarms due to their effective detection of temperature and are versatile due to their small size. These thermistors are crucial for temperature detection, not just in fire alarms, but in any piece of machinery that requires temperature detection.
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