Go Direct* 3-Axis Magnetic Field Sensor, allows you to determine the magnitude and direction of the magnetic field at any point in space, Measurement range: +/-5 Mt, Operating temperature: -40 deg C to 85 deg C, Dimensions: 19x12.2x0.7 cm, Factory-calibrated
HOBO* TidbiT Wireless Temperature Data Logger, compact, waterproof up to 120m (400 feet), features wireless setup and download via Bluetooth Low Energy (BLE) and has a large memory that stores 96,000 measurements, +/- 0.2 deg C (+/-0.36 deg F) accuracy
Go Wireless* Exercise Heart Rate, Recommended for College, High School, and Middle School Science, excellent hands-free option for continuously monitoring heart rate before, during, and after exercise or while a person is stationary
HOBO* Probe Temperature Data Logger, Food-grade 316 Series Stainless Steel, High-accuracy, extended temperature range, Suitable for high pressure applications to 2200psi, Fast readout via direct USB interface, Size: 5 inch