SK-FR80-120PMC-USB Fujitsu, SK-FR80-120PMC-USB Datasheet - Page 91

• Manufacturer Part Number: SK-FR80-120PMC-USB
• Description: BOARD, EVAL, FOR MB91660 SERIES
• Manufacturer: Fujitsu
• Type: Evaluation Boardr

Specifications of SK-FR80-120PMC-USB

• Kit Features: External FRAM Memory MB85RS256, USB A & USB A Connectors, USB To Serial Converter
• Mcu Supported Families: MB91660
• Silicon Manufacturer: Fujitsu
• Core Architecture: FR80
• Kit Contents: Board, USB A To Mini-B Cable
• Features: USB Connector, 7-segment LED, Humidity Sensor
• Rohs Compliant: No
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

leading to performance loss. The material used in the sensor to detect humidity defines
its type, such as high-molecular, metallic oxide, or electrolytic.
The high-molecular film absorbs and releases moisture, thus creating a change in its
permittivity which is used to measure the relative humidity in air.
electrodes, much like a capacitor. The permittivity change in the high-molecular film
creates a measureable change in the capacitor's capacity. The electrodes are made of
an extremely thin metal film that permits the passage of moisture as it is absorbed or
released by the high-molecular film. A high-molecular humidity sensor can be of the
capacity changing or resistance changing type. The explanation thus far is for a capacity
changing type. The resistance changing type is made by affixing moisture sensitive
material on a comb-like electrode and is simpler in construction than the capacity type.
An added benefit of the resistance type is that it is not affected by the capacity of the
wire leads, allowing wiring lengths to be as long as necessary.
We will explain the most common type of humidity sensor, the high-molecular sensor.
One way of making this sensor is to place the high-molecular material between two
The starter kit board has a humidity sensor device (HOKURIKU ELECTRIC
Substrate
Capacity type
Electrode
Figure 8.2-1 Structure of a humidity sensor
(moisture sensitive
High-molecular
material)
material
90
Substrate
Electrode (comb-like)
Resistance type
(moisture sensitive
High-molecular
material)
material