BME280 Atmospheric Sensor Breakout is the easy way to measure barometric pressure, humidity, and temperature readings all without taking up too much space. Basically, anything you need to know about atmospheric conditions you can find out from this tiny breakout. The BME280 Breakout has been design to be used in indoor/outdoor navigation, weather forecasting, home automation, and even personal health and wellness monitoring.

The on-board BME280 sensor measures atmospheric pressure from 30kPa to 110kPa as well as relative humidity and temperature. The breakout provides a 3.3V SPI interface, a 5V tolerant I2C interface (with pull-up resistors to 3.3V), takes measurements at less than 1mA and idles less than 5µA. The BME280 Breakout board has 10 pins, but no more than six are used at a single time. The left side of the board provide power, ground, and I2C pins. The remaining pins which provide SPI functionality and have another power and ground, are broken out on the other side.

Features:

• Operation Voltage: 3.3V
• I2C & SPI Communications Interface
• Temp Range: -40C to 85C
• Humidity Range: 0 – 100% RH, =-3% from 20-80%
• Pressure Range: 30,000Pa to 110,000Pa, relative accuracy of 12Pa, absolute accuracy of 100Pa
• Altitude Range: 0 to 30,000 ft (9.2 km), relative accuracy of 3.3 ft (1 m) at sea level, 6.6 (2 m) at 30,000 ft.

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Color: Black
Accuracy: 1.5C.
Measuring range: -50C~+110C.
Cable Length: 80cm.
Diameter: 47.8mm x 28.5mm x 14.3mm.
Power by: 2 x LR44 button batteries. (Battery Included)
High quality LCD refrigerator Celsius thermometer, wondeful tools!

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MAX6675 is an American company with a cold junction compensation, linearity correction, thermocouple break detection ADC Serial K-type thermocouple, its temperature resolution capability is 0. 25 Degree, cold junction compensation range – 20 ~ + 80 Degree, wide operating voltage range 3. 0 ~ 5. 5V

• Operating voltage: 3. 0 ~ 5. 5V
• Internal integrated cold junction compensation circuit;
• With a simple three serial interface;
• Temperature signal can be converted into 12-bit digital
• Temperature resolution of: 0. 25 Degree;
• Cold junction compensation range: – 20 ~ + 80 Degree,
• Embedded thermocouple break detection circuitry.
• Using SPI 3 wire communication
• K-type temperature probe
• Type K temperature range 0-800 degrees

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Simply connect the first pin on the left to 3-5V power, the second pin to your data input pin and the right most pin to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin!

Features:

• Low cost
• 3 to 5V power and I/O
• 1-1.5mA measuring current
• 40-50 uA standby current
• 2.5mA max current use during conversion (while requesting data)
• Good for 0-100% humidity readings with 2-5% accuracy
• Good for -40 to 80°C temperature readings ±0.5°C accuracy
• No more than 0.5 Hz sampling rate (once every 2 seconds)
• Body size 27mm x 59mm x 13.5mm (1.05″ x 2.32″ x 0.53″)
• 4 pins, 0.1″ spacing

Feature & Application:

• High precision
• Capacitive type
• Full range temperature compensated
• Relative humidity and temperature measurement
• Calibrated digital signal
• Outstanding long-term stability
• Extra components not needed
• Long transmission distance, up to 100 meters
• Low power consumption
• 4 pins packaged and fully interchangeable

The post DHT22 Digital Temperature and Humidity Sensor; Temperature and Humidity Module AM2302 appeared first on Absolute Native Electronics.

A thermocouple is a device consisting of two different conductors(usually metal alloys) that produce a voltage proportional to a temperature difference between either end of the pair of conductors.

Features:

Element: PT100

Temperature range: -200°C ~420°C

Terminal contact:3EA (applied 3wire:A, B, b)

Structure type without terminal head Widely used for industrial or laboratory to test equipments temperature.

Material of protection tube(probe part):Stainless steel

Material of lead wire:Insulation:teflon (with electromagnetic shield)

Total length of wire :470mm

Dimension: 4*30 mm

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Digital Temperature & Humidity Sensor

This temperature & Humidity sensor is a wired version of the DHT21, in a large plastic body. It is a basic, 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.

• DHT21 is the former name, new name is AM2301
• 4-pin package
• Ultra-low power
• No additional components
• Excellent long-term stability
• All calibration, digital output
• Completely interchangeable
• Long distance signal transmission
• Relative humidity and temperature measurement

Specifications:

1. Type: AM2301
2. Accuracy resolution: 0.1
3. Measurement range: 0-100%RH
4. Temperature measurement range: -40℃ ~ +80℃
5. Humidity measurement precision: ±3%RH
6. Temperature measurement precision: ±0.5℃
7. Monobus digital output
8. 20cm-cable
9. Dimensions: 2.32 in x 1.02 in x 0.55 in (5.9 cm x 2.6 cm x 1.4 cm)

Connection:

This Sensor has 3 wires, connect these wires to your Arduino/Crowduino Project as following:

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