The cheapest amplifier on the market to assemble DIY seismometer projects

CPS120 is a high quality and low cost capacitive absolute pressure sensor with fully compensated output.

The HMC5883is a digital compass designed for low-field magnetic sensing. This device has a wide magnetic field range of +/-8 Oe.

SHT25 I2C Humidity and Temperature Sensor ±1.8%RH ±0.2°C I2C Mini Module.

MCP9808 is a highly accurate digital temperature sensor ±0.5°C I2C mini module.

The E18-D80NK is an advanced low-cost IR Proximity Sensor with an obstacle detection range of 3 cm to 80 cm.

BMG160 is basically a 16-bit, digital, tri-axial, gyroscope sensor which can measure angular rates.

BMA250 is a small, thin, ultralow power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16 g.

HYT939 is a digital humidity sensor which works on I2C communication protocol.

STS21 Digital Temperature Sensor offers superior performance and a space saving footprint.