| 摘要 |
PURPOSE:To improve response, durability and reliability by housing a substrate, having a bead type thermistor and adjusting resistance arranged, in a protective tube having an air hole at its bottom part. CONSTITUTION:Lead wire 30 connected to one terminal 28 at the head of terminal- shaped housing 24 is connected to resistances 46 and 48 on substrate 34 housed in the hollow part of protective tube 32. Bead type thermistor 44 supported by four lead wires is fixed to notch part 40 at the end part of substrate 34, resistance 46 in parallel to the thermistor and resistance 48 in series to it are connected, and printed conduction part 50 is connected with those resistances 46 and 48. Protective tube 32 is provided with air hole 37 and thermistor 44 is exposed direct to the outside air. Resistances 44 and 46 are printed on substrate 34 and can be adjusted by laser trimming. Therefore, the response, reliability and durability can be improved. |
