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HC-SR501 Human IR Sensor

Operating voltage range:   4.5 - 20 VDC
Quiescent current:  <50uA
Output:  High = 3.3 V  :   Low = 0V

AM312 IR Human Motion Sensor

2.7 - 12 VDC Operation

On Time = 2 sec. retriggerable

High OutPut

BMP-280 Temperature and Pressure Sensor Module
I2C Interfaces : 1.8 - 5V
Headers included
Bosch SensorTek

BMP-280 Temperature and Pressure Sensor Module
I2C and SPI Interfaces
3V3 Operation
Headers included
Bosch SensorTek

LM35DZ TO-92 analog Temp Sensor microPower - Linear - Centigrade

MQ-135 Air Quality Sensor - Analog and Digital Outputs

Tin Oxide (SnO2) sensor can detect air pollution gases such as ammonia, sulfide, benzene vapor etc.

Low digital output will indicate gas detection.

Analog output varies in proportion to amount of pollution.

+5V TTL operation.

Note: the sensor requires a minimum og 20sec. warm up time after power is applied.

DS18B20 TO-92 digital Temp Sensor 1-Wire - Centigrade programmable alarm function