This DFRobot Gravity Analog Capacitive Soil Moisture Sensor- Corrosion Resistant measures soil moisture levels by capacitive sensing, rather than resistive sensing like other types of moisture sensors. It is made of a corrosion-resistant material giving it long service life. Insert it into the soil and impress your friends with the real-time soil moisture data!

The product includes an onboard voltage regulator which gives it an operating voltage range of 3.3 ~ 5.5V. It is compatible with low-voltage MCUs (both 3.3V and 5V logic). To make it compatible with a Raspberry Pi, an ADC converter is required.

This sensor is compatible with our 3-pin “Gravity” interface, which means it can be directly connected to the Gravity I/O Expansion Shield.

Applications:

B3950 10K NTC waterproof High precision thermistor temperature Sensor 5 x 25mm with XH2.54 Connector can be used to measure temperature in a variety of applications.

The sensor has stainless steel 5 x 25mm tip with an XH2.54 connector with a 0.5-meter cable. It is Negative thermal coefficient (NTC) will decrease. But the formula in practice is not linear,  so sometimes an accurate table of measurements is better than the linear formula. These measurements can usually be found in the datasheet that accompanies the thermistor.

Specifications and Features:

1. Probe sheath material: Stainless Steel
2. Style: B3950 10K
3. Resistance value: 10K ± 1%
4. Measurement range: -20 to 105 °C
5. Cable Length: 0.5 Meter
6. Size of probe: 5 x 25 mm
7. Output wires: 2
8. Typical Dissipation Constant: 5mW/ °C
9. Probe insulation: >100MOhm

Package Includes:

1 x B3950 10K NTC Thermistor Temperature Sensor 5*25mm with XH2.54 Connector with 0.5 Meter Cable

Individually calibrated and tested,  Amphenol CC2D25S Advanced Sensors Humidity/temp Sensor performs ±2% from 20% to 80%RH (±3% over the entire humidity range), and yet is simple and ready to use without further calibration or temperature compensation.
ChipCap 2-SIP offers another sensible sensing solution for excellent reliability, high accuracy, and cost-effective sensing applications

Note: For more technical information refer to Datasheet in attachment section

Features:

1. Fully Calibrated & Temperature Compensated
2. Digital (I2 C) Output
3. Low Current Consumption
4. SIP (Single-In-line-Package)
5. Reliable in Harsh Environment
6. Eliminates the reconditioning procedure needed for surface mount RH sensors
7. Field replaceable.
8. Allows better air circulation and response time

Package Includes:

1 x Amphenol CC2D25S Advanced Humidity/temp Sensor, 2%, 5v

AHT2415C temperature and humidity probe adopts an integrated digital temperature and humidity chip, which outputs standard I²C signals and calibrated before delivery. The sensor Filter Membrane can effectively prevent the interference by water vapor and dust; Sensor wire length 550mm (±5), and offers customization options.

feature:

1.  304 stainless steel shell
2.  Excellent impact resistance, heat resistance, low temperature resistance ,chemical resistance and electrical properties
3. Fully calibrated
4.  Digital-output,I²Cinterface
5.  Excellent long-term stability
6.  Quick response, fast recovery time, strong anti-interference ability

specification:

1. Operating Voltage: 2.2~5.5V
2. Working Current: 980μA (Typical)
3. Temperature Range: 30~80℃
4. Humidity Range: 0~100%RH
5. Accuracy: ±0.5℃;±3%RH;
6. Typical Power: 3.2mW
7. Interface: I²C

Package include:

1 X AHT2415C Temperature and Humidity Probe

B3950 10K NTC waterproof High precision thermistor temperature Sensor 5 x 25mm with XH2.54 Connector can be used to measure temperature in a variety of applications.

The sensor has stainless steel 5 x 25mm tip with an XH2.54 connector with a 5-meter cable. It is Negative thermal coefficient (NTC) will decrease. But the formula in practice is not linear,  so sometimes an accurate table of measurements is better than the linear formula. These measurements can usually be found in the datasheet that accompanies the thermistor.

Specifications and Features:

1. Probe sheath material: Stainless Steel
2. Style: B3950 10K
3. Resistance value: 10K ± 1%
4. Measurement range: -20 to 105 °C
5. Cable Length: 3-meter
6. Size of probe: 5 x 25 mm
7. Output wires: 2
8. Typical Dissipation Constant: 5mW/ °C
9. Probe insulation: >100MOhm

Package Includes:

1 x B3950 10K NTC Thermistor Temperature Sensor 5*25mm with XH2.54 Connector with 3-meter Cable

The DHT-11 Digital Temperature And Humidity Sensor is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin (no analog input pins needed).

Its fairly simple to use, but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so in your code please use sensor reading interval at 2 seconds or more. Compared to the DHT22, this sensor is less precise, less accurate and works in a smaller range of temperature/humidity.

But despite its disadvantages over DHT22, it is smaller and less expensive sensor for temperature and humidity measurement.

Note: This package does not include Arduino board, you have to buy it separately.

Features :

1. Low power consumption.
2. Relative humidity and temperature measurement
3. All calibration, digital output
4. Excellent long-term stability
5. No additional components
6. Long distance signal transmission
7. Ultra-low power
8. 4-pin package
9. Completely interchangeable
10. Humidity measuring range: 20%~90%RH(0~50 degree (temperature compensation).
11. Temperature measuring range: 0~+50degree.
12. Humidity measurement accuracy: ±5.0%RH.
13. Temperature measurement accuracy: ±2.0degree.

Packages Includes:

1 x DHT-11 Digital Temperature And Humidity Sensor- Normal Quality