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OTP-638D2 IR Non-contact thermopile sensor - OTP contactless Infrared Temperature Sensor Module
Product description: The OTP-638D2 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 area of diameter 545 μm. The thermopile sensor provides nearly Johnson-noise-limited performance, which can be calculated by its ohmic series resistance. A thermistor with a lead connected to the ground is also provided inside the TO package for ambient temperature reference.
Features: 1. TO-46 metal housing 2. Thermistor temperature reference included 3. Low-temperature coefficient of sensitivity 4. Ideally suited for ear thermometers, miniature pyrometer
Applications: 1. Non-contact temperature measurements 2. Ear thermometers, Forehead thermometer 3. Home appliance temperature measurements
Specification: 1. Chip: OTP-638D2; Small size, low cost; Easy to integrate; Medical grade 2. Sensitivity: 128V/W (at 323K, 5-14μm); TC of sensitivity: 0.14 ±0.05 %/K (at 25°C) 3. Thermopile Voltage: 2.4 ±0.7 mV (at Tb:50°C, Ta:25°C 5-14μm); Active area in diameter: 545 μm 4. Resistance of thermopile: 115 ±35 KΩ (at 25°C); TC of resistance: 0.1 ±0.05 %/K (at 25°C) 5. Time constant: 17ms; Noise voltage: 42.9 nV/Hz 1/2 (at r.m.s 300K); NEP: 0.34 nW/Hz 1/2 (at 323K, 5-14μm) 6. Thermistor resistance: 100 ±5% KΩ (at 25°C); β value: 3964 ±0.5%K (at 25°C/100°C); Field of view: 90 degress at 50% target signal