Check the listing for details. Used & Tested SMC ISE30-01-28 Digital Pressure Switch. Condition: Used. Listed at 74.79 USD. SMC ISE30-01-28. Pressure Switch. Used & Tested. 12 → 24V dc. What should I do if the item quality is bad / does not fit ?. 24 months warranty is provided to our products. The length of the warranty depends on the nature of the products.