Tecmark TBS109A Air Switch 16amp SPNO MomentaryTecmark TBS109A Momentary Air Switch Pneumatic Switch. This is a SPNO single pole normally open switch (only makes contact when the air button is pushed). normally fitted to pumps heaters and air switch boxes fitted with PCB's Power: 250vac 16amp resistive (i. e.. Heater) and 4amp inductive (i. e.. Pump). Hole size required : 15mm. Pipe Size required: 3mm.
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