Johnson Controls A421
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Johnson Controls A421 Electronic Temperature Controller | Type 4X
Johnson Controls
$583.00Johnson Controls A421 Electronic Temperature Controller | Type 4X The A421 Series Electronic Temperature Controls are single-stage, electronic temperature controls with a single-pole, double-throw (SPDT) output relay. A421 Controls feature a backlit LCD...$583.00
Johnson Controls A421 Electronic Temperature Controller
The A421 Series Electronic Temperature Controls are single-stage, electronic temperature controls with a single-pole, double-throw (SPDT) output relay.