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High Accuracy Medical Ventilator NTC Temperature Sensor 2k 2.252k 3k 3.3k 10k 20k 30k
Description Of The Ventilator NTC Temperature Sensor
Temperature sensors of temperature measuring type are used in the ventilator. It is generally used to detect, control, and adjust the temperature in the airflow, which is more conducive to the patient's breathing.For temperature sensing, ventilator manufacturers can choose from sensing elements that can provide patients with warm and humid airflow to improve breathing comfort. Warm and humid air can also help patients reduce sore throats caused by inhaling cold, dry air. The discrete thermistor is usually installed directly in the air flow path to detect the air temperature. The sensor is used in conjunction with a microcontroller that detects the temperature of the airflow, and interacts with a controller that controls and regulates the temperature of the airflow.
Feature Of The Ventilator NTC Temperature Sensor
* High waterproof
* High moisture proof
* High precision
* High sensitivity
Design considerations and procedure of temperature sensor
| 1 | Choose the shape acoording to customer's design or assemble requirements, and confirm the thermistor. |
| 2 | Confirm the thermistor element and other materials according to customers' requirement |
| 3 | Choose the suitable resistance,B value and tolerance |
| 4 | Choose suitable moisture-proof and insulation technology to meet customer's requirement |
| 5 | Choose suitable encapsulation structure to meet performance requirements of mechanical shock resistance |
| 6 | Meet customer's special requirements. |
Specification Of The Ventilator NTC Temperature Sensor
Reliability Test Of The Ventilator NTC Temperature Sensor
| Test Item | Test Standard | Test method | Performance requirements |
| Zero Power Resistance | IEC 60539-1 | Immerse samples in the constant temperature bath at 25℃±0.005℃,test steady resistance | Resistance tol ±1%
|
| B value | IEC60539-1 | Immerse samples in the constant temperature bath at 25℃,50℃(or 85℃), test steady resistance,and calculate B value | Resistance tol ±1%
|
| Free fall | IEC60068-2-32
| Fall height: 1.5±0.1m,Surface: Cement , 1 time | No obvious damage, R25 △R/R≤±1%
|
| Insulation | IEC60539-1
| 500V pressure on insulation shell test insulation resistance | >500MOhm
|
| Withstand voltage | IEC60539-1 | Withstand voltage: 1500V/AC ,Leakage current:2mA Lasting: 60sec
| No obvious damage
|
| Tension | IEC60068-2-21 | Pull uniform speed at the end, F>4.0KG(requested by customer)
| No obvious damage, R25 △R/R≤±1%
|
| Vibration | Q/HBm 108-94 | Test frequency: 10~500Hz,swing: 1.2mm acceleration: 30m/s2 Direction X,Y,Z Time:8Hour/direction | No obvious damage, R25 △R/R≤±1%
|
| Steady humidity and heat | IEC60068-2-78 | Temp:40±2℃ Humidity:92-95%RH Time:1000±24Hour | No obvious damage, R25 △R/R≤±1%
|
| Thermal time constant | EC60539-1 | Immerse in 25℃ water,after thermal balance,immerse in 85℃,resistance arrives 63.2%,calculate total time | <10 sec
|
| High temperature storage | IEC60068-2-2 | Temp:125℃±5℃ Time: 1000±24Hour | No obvious damage, R25 △R/R≤±1% |
| Cold and thermal shock | IEC60068-2-14 | -40℃~+125℃ T1:30min Cycle time:1000
| No obvious damage, R25 △R/R≤±1%
|
| Knock experiment | IEC60068-2-77 | Acceleration:250m/s2 Pulse lasting: 6ms Knock times: 1000 Recovery time: 2 Hour
| No obvious damage, R25 △R/R≤±1%
|
| Low temperature storage | IEC60068-2-1 | Temp: 40±2℃ Time: 1000±24Hour
| No obvious damage, R25 △R/R≤±1%
|
| Salt spray | IEC60068-2-11 | Temp: 35±2℃ Collection hour : 1.0mL~2.0mL Time: determine per as actual demand | No obvious damage, R25 △R/R≤±1% |