●All specifications in this catalog and production status of products are subject to change without notice. Prior to the purchase, please contact NEC TOKIN for updated product data.

●Please request for a specification sheet for detailed product data prior to the purchase.

●Before using the product in this catalog, please read "Precautions" and other safety precautions listed in the printed version catalog.

2012.06.04 0000SENVOL11E1206H0

NEC TOKIN Sensors Vol.11　5

Structures and Principles of Operation

sensing switches composed of a magnet and a

temperature-sensing soft ferromagnetic substance

flux density decreases as the temperature increases, and

it turns into a paramagnetic substance at the Curie

temperature.

(a) Normally closed type

(b)Normally open type

NS

NS

NS

NS

NS

NS

Φ1

Φ1

Φ2

Permanent magnet

Thermorite

Low temperature

High temperature

Reed switch

NS

NS

Φ1

Spacer (gap)

Low temperature

High temperature

Permanent magnet

Reed switch

Thermorite

Permanent magnet

Φ2

NS

NS

Φ1

Φ2

• Please ask for a copy of specification and check the contents thoroughly before the actual use.

• Please contact us before deciding your specifications.

• Do not use in close proximity to strongly magnetized parts.

• Do not use if dropped or strongly shocked.

• Do NOT use with greater load than specified.

When installing these switches in circuits prone to producing surge voltage (inductive load) or rush current

(in lamps and motors), an appropriate switch type should be used, or a contact point protection circuit added.

• Avoid stress (especially torsion) in case of additional processing.

• Each reed switch has a specific resonance frequency. Please contact us when an oscillation is added.