OTP-N538U Thermopile Infrared Temperature Sensor
| +25 3 % $2.61 |
| +100 5 % $2.57 |
| +300 7 % $2.52 |
| +500 8 % $2.48 |
| +1000 10 % $2.43 |
Description
The OTP-538U is a thermopile sensor in classic TO-46 housing. The sensor is composed of 116 elements of thermocouple in series on a floating micro-membrane having an active diameter of 545 μm and with blacken surface to absorb the incident thermal infrared radiation, which induces a voltage response at output terminals. The sensor chip is fabricated by a unique front-surface bulk
micromachining technology, which result in smaller size and faster to response ambient temperature change.The IR window is a bandpass filter having its 50% cut-on wavelength at 5 μm, and cut-down at 14μm. The sensor responses proportionally to the incident IR radiation and has a constant signal response up to its cut-off frequency, which is limited by the sensor thermal time constant of tens
millisecond range.The OTP-538U thermopile sensor provides nearly Johnson-noise-limited performance, which can be calculated by its ohmic series resistance. A thermistor element, with a lead connected to ground, is also provided inside the TO package for ambient temperature reference.
Applications
Medical Application: Ear thermometers
Home Facility: Microwave oven, Hair dryer, Safety system, Home security, Refrigerator & Air
conditioner
Industry Application: Process monitor and controller, Infrared non-contact thermometers
Automobile Application: Thermal sensing system
Features
Non-contact temperature detection
Voltage output, easy to take signal
Zero power consumption
Wide detection temperature range