AKKR8 indoor sensor A8 ITH

Temperature and humidity

The AKKR8 temperature and humidity sensor features a monolithic integrated circuit for precise measurement. It offers low deviation and hysteresis, combined with excellent long-term stability. Both the humidity and temperature sensors are factory-calibrated, with calibration data stored directly on the chip — ensuring consistent accuracy without the need for recalibration or software adjustments.

Measurement data:
– Relative humidity: ±3% RH (max), 0–80% RH
– Temperature: ±0.4 °C (max), –10 to 85 °C
– Operating range: 0–100% RH

The high-accuracy sensor performs best in stable environments but should not come into contact with water, such as during heavy condensation. When air at a given temperature and relative humidity is cooled, the relative humidity increases. Cold surfaces can cause water vapor to condense, potentially affecting readings. Outdoor installation in environments with large temperature fluctuations is therefore not recommended.

External Temperature Probes

AKKR8 supports external temperature probes (Dallas 1-wire) that can be connected to the screw terminals on the board with GND, DATA, and 3V3. The 1-wire interface has three screw terminal connections on the board, but it can also be used with devices that have two connections.

When using devices with three connections, the power supply pin should be connected to 3V3; otherwise, it can be ignored. There is already a resistor on the board, so you do not need to connect an additional one.

One-Wire Connection

The AKKR8 sensor is a 1-Wire master and is therefore expected to supply power to the external devices at 3.3 V. You should not supply the AKKR8 with 3.3 V from other devices via the Dallas 1-wire connection.

Multiple Sensor Support

Each 1-Wire slave device has a guaranteed unique address stored in a memory chip. This allows the AKKR8 to manage multiple devices of the same type without conflicts.

You can connect up to six Dallas 1-wire temperature sensors to a single master. Another advantage of Dallas 1-wire is that the signal is not affected by the cable resistance, although a maximum length of 25 meters is normally recommended.

DS18B20 Characteristics

Normal characteristics for a Dallas DS18B20 are that they are intended for a measurement range of -55°C to +125°C, with an accuracy of ±0.5°C in the range of -10°C to +85°C.

Technical specification