The unique electric switch design in the 1640 is another Dwyer Instrument, Inc. innovation. The Dwyer® Model 1640 Differential Pressure Switch resembles the Series 1630 switches. The Model 1640, however, is equipped with a single pole, double throw floating contact switch (not snap acting) so it functions as a null switch.
Answer: Our products are 100% imported and authenticated. To place order just either contact with us or place your order online. One of our sales person contact with you.
Answer: No, you can only place order online because we import from USA as get order.
Answer: After order confirmation we do our best to deliver in 3 to 4 week.
Answer: We do our best to list exact prices of all products but since dollar fluctuate in Pakistan so sometime we update at the time of order confirmation.
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