Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Electrical Specifications

NOTICE: Cold and Hot in the following specifications express the temperature of the sensors themselves.
Cold is from -10°C (14°F) to 50°C (104°F) and
Hot is from 50°C (104°F) to 100°C (212°F).

Resistance between terminals
Cold 835 - 1,400 Ohms
Hot 1,060 - 1,645 Ohms