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" expresses 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 1,630 - 2,740 Ohms
Hot 2,065 - 3,225 Ohms