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KTM-41-IT
Suggested applications
Air conditioners
Fan heaters
Room temperature sensors
Outdoor temperature sensors
Electric water boilers
Piping
Floor heaters
Dehumidifiers
Shape and dimensions:
Specifications:
| Resistance | R(25℃) = 10kΩ ±3% |
| B constant | B(25℃/50℃) = 3950K ±1.5% |
| Insulation resistance | Over 100MΩ at 500V DC (heat sensing portion in water, between water and lead wires) |
| Dielectric strength | 1000V AC for one minute or 1200V AC for one second, without failure (heat sensing section in water, between water and lead wires; cut-off current 0.5mA.) |
| Thermal time constant | τ = less than 10 seconds (in agitated water) |
| Thermal dissipation constant | σ = approximately 8mW/℃ (in still air) |
| Operating temperature range | -20℃ to +80℃ |
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 Download R/T table for KTM-41-IT
Reliability testing: other rating
Mechanical strength tests
The following tests are to be carried out. After testing, there must be no failure in electrical characteristics. |
| Vibration test | At 1.5mm of overall amplitude or 98m/s2, whichever is lower. Sweep frequency from 10 to 500 to 10Hz in approximately 15 minutes. Vibration test continues for two hours each in X, Y and Z directions |
| Natural drop test | Three free drops from a height of 75cm onto an oak board 3 cm or thicker (or an equivalent wood board) |
Environmental resistance tests
After conducting the following tests, the is to left for 1 hour at room temperature. Rate of change in resistance is to be less than 3%; insulating resistance and dielectric strength must meet standards. |
| Cold resistance | 1,000 hours in air at -20℃ ±3℃ |
| Heat resistance | 1,000 hours in air at 80℃ ±3℃ |
| Temperature cycle test | 100 cycles of 30 minutes in air at -20℃±3℃ to 15 minutes in air at room temperature to 30 minutes in air at 80℃±2℃ to 15 minutes in air at room temperature |
| Heat and humidity resistance (stationary test) | 1,000 hours at 60℃ ±3℃, and humidity of 90 to 95% |
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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. | 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
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| 6. | When disposing of thermistors, treat them as industrial waste and observe all applicable laws and regulations. |
| 7. | To minimize temperature measurement error, the heat sensing surface of the thermistor must be in direct contact with the object to be measured. |
| 8. | The thermistor must be kept away from condensate, dew, or other moisture. |
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KTM-41-IT
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