We utilised the SHT10 for our Minimum Viable Product Personal Food Computer (MVP PFC). Here is the thread on the OpenAg forums we have about that (there are three, the second has TONS of information regarding small scale system design). We settled on about a $250 design that is intended to be built by a maker and then can then be used to teach about plant science/biology/STEM education.
An intern put together this document summarising a few of the sensors we have been looking at for temp/humidity with pros/cons. Here were her findings:
DS18B20 Waterproof Temperature Sensor
$5.95 https://www.amazon.com/SUNKEE-DS18B20-Temperature-Sensor-DS18B20DS18B20/dp/B008HODWBU
• SUNKEE
• 3.0 – 5.5 V power supply
• -55 – 125 °C range
• Stainless steal casing
$16.95 https://www.amazon.com/CanaKit-Waterproof-Temperature-Sensor-DS18B20/dp/B007R9UU5C
• CanaKit
• 3.0 – 5.5V power supply
• -55 – 125 °C range
• ~ 1 m length cable
$5.99 https://www.amazon.com/DROK-Waterproof-Temperature-DS18B20-Thermometer/dp/B00IYE4X70/ref=pd_lpo_vtph_469_lp_t_3?_encoding=UTF8&psc=1&refRID=BYZE9MKP587Y9QZ3CEHT
• DROK
• 3.0 – 5.5V power supply
• -55 – 125 °C range
• 1 m length cable
• Stainless steal casing
AM2315 Temperature & Humidity Sensor
$23.95 https://www.amazon.com/AM2315-Encased-Temperature-Humidity-Raspberry/dp/B011PR0WCW
• Specifically for Raspberry Pi
• Includes mounting bracket and hardware
• I2C interface
• Good for -20 to 80°C temperature readings ±0.1°C typical accuracy
• Good for 0-100% humidity readings with minimum 2% accuracy