Great reasons to buy from us:
-
Quality
Quality Guaranteed -
Free shipping
Fast Shipping -
Fast Shipping
Great Value -
Free shipping
Secure Online Ordering
- Pressure Connection Type: 1/8 in FNPT
- Housing Material: Steel
- Sample Line Connection Size: 1/8 in
- Mounting Hole Diameter: 5/16 in
- Material: Steel
- Pressure Type: Differential
Specifications
| Part Number | 1638-0 |
| Brand | Dwyer Instruments |
| Action | Standard |
| Contact Form | SPDT |
| Pressure Connection Type | 1/8 in FNPT |
| Range | 0.05-0.25" w.c. |
| Housing Material | Steel |
| Sample Line Connection Size | 1/8 in |
| Mounting Hole Diameter | 5/16 in |
| Item | Pressure Switch |
| Standards | CSA, FM, UL Listed |
| Features | Visible set point indicator simplifies operation and trouble shooting; Large diaphragm provides low range accuracy providing precise control; Current loads of up to 15 amps supports most small electrical loads supporting a broader range of HVAC and Process applications without the need for additional relays and components |
| Electrical Connection | Screw Terminals |
| Process Connection | 1/8" female NPT. |
| Application | Air Conditioning, Duct Heater Control |
| Weight | 3 lb |
| Material | Steel |
| Mounting Orientation | Vertical |
| Number of Switches | 1 |
| Pressure Type | Differential |
| Sample Line Connector Type | NPT |
| Product Type | Differential Pressure Switch |
| Mounting Hole Center to Center Distance | 3 in |
| Maximum Operating Temperature | 110 Degrees F |
| Housing Type | Conduit Box |
| Maximum Differential Pressure Setting | 0.25 in wc |
| Minimum Operating Temperature | -30 Degrees F |
| Pressure Setpoint Type | Adjustable |
| Input Voltage | 120 to 480V AC, 125V AC, 250V AC |
| Maximum Pressure Rating | 10 psig |
| Minimum Pressure Setting | 0.05 in wc |
| Maximum Pressure Setting | 0.25 in wc |
| Temperature Limits | -30 to 110°F (-34.4 to 43.3°C). |
| Repeatability | ±1%. |
| Switch Type | SPDT. |
| Service | Air and non-combustible, compatible gases. |
| Agency Approvals | CSA, FM, UL. |
| Set Point Adjustment | Screw type with enclosed scale. |
| Factory On Setting | 0.05"wc |
| Factory Off Setting | 0.25"wc |
Description
The Dwyer Instruments 1638-0 is a standard SPDT pressure switch with a 0.05 to 0.25 in H2O range. It monitors pressure changes to open or close an electrical circuit, supporting current loads of up to 15 amps. The switch features a 1/8" FNPT process connection, a steel housing, and a visible set point indicator. It is CSA, FM, and UL Listed.
Shipping and dispatch
Shipping method and available services depend on the item and delivery address. Check the product shipping information and checkout for shipping options and charges.
Dispatch times vary by product and supplier. Any supplier dispatch estimate shown is subject to availability. Transit time begins after shipment and is additional to dispatch time.
Freight shipments
Products identified as freight ship by truck. Review the available delivery service and charges at checkout; delivery arrangements depend on the selected service.
Inspection and Damage:
Upon delivery, please inspect the carton and contents for any damage. If you find any damage, document it on the driver's delivery receipt and contact us immediately at support@proreplacementparts.com no later than 24 hours from the delivery time. We cannot accept responsibility for damage that is not noted on the driver's delivery receipt at the time of delivery.
Order Cancellations:
All order cancellations must be requested within 24 hours of placing the order. After this period, our standard return policy will take effect.
Thank you for choosing Pro Replacement Parts. We are dedicated to providing you with the best service and ensuring your orders are delivered in a timely and efficient manner. If you have any questions or need further assistance, please don't hesitate to contact us.
Exact part numbers. Every listing starts with the manufacturer part number, so you can match it to the part in your equipment before you order. Not sure it fits? Ask us first.
Clear shipping. Check the product shipping information for the shipping method and any supplier dispatch estimate. Shipping options and charges are shown at checkout.
Real people. Call 617-286-6694 (Monday to Friday, 9 AM to 6 PM ET) or email support@proreplacementparts.com with a part number or model number.
Returns. Unopened parts can be returned within 30 days. Electrical and gas parts are final sale once opened. Details are on our Returns & Refunds page.
Your purchase is covered by the Manufacturer’s Limited Warranty.
For return/refund information, please visit our Returns & Refunds page.
Description
- Pressure Connection Type: 1/8 in FNPT
- Housing Material: Steel
- Sample Line Connection Size: 1/8 in
- Mounting Hole Diameter: 5/16 in
- Material: Steel
- Pressure Type: Differential
Specifications
| Part Number | 1638-0 |
| Brand | Dwyer Instruments |
| Action | Standard |
| Contact Form | SPDT |
| Pressure Connection Type | 1/8 in FNPT |
| Range | 0.05-0.25" w.c. |
| Housing Material | Steel |
| Sample Line Connection Size | 1/8 in |
| Mounting Hole Diameter | 5/16 in |
| Item | Pressure Switch |
| Standards | CSA, FM, UL Listed |
| Features | Visible set point indicator simplifies operation and trouble shooting; Large diaphragm provides low range accuracy providing precise control; Current loads of up to 15 amps supports most small electrical loads supporting a broader range of HVAC and Process applications without the need for additional relays and components |
| Electrical Connection | Screw Terminals |
| Process Connection | 1/8" female NPT. |
| Application | Air Conditioning, Duct Heater Control |
| Weight | 3 lb |
| Material | Steel |
| Mounting Orientation | Vertical |
| Number of Switches | 1 |
| Pressure Type | Differential |
| Sample Line Connector Type | NPT |
| Product Type | Differential Pressure Switch |
| Mounting Hole Center to Center Distance | 3 in |
| Maximum Operating Temperature | 110 Degrees F |
| Housing Type | Conduit Box |
| Maximum Differential Pressure Setting | 0.25 in wc |
| Minimum Operating Temperature | -30 Degrees F |
| Pressure Setpoint Type | Adjustable |
| Input Voltage | 120 to 480V AC, 125V AC, 250V AC |
| Maximum Pressure Rating | 10 psig |
| Minimum Pressure Setting | 0.05 in wc |
| Maximum Pressure Setting | 0.25 in wc |
| Temperature Limits | -30 to 110°F (-34.4 to 43.3°C). |
| Repeatability | ±1%. |
| Switch Type | SPDT. |
| Service | Air and non-combustible, compatible gases. |
| Agency Approvals | CSA, FM, UL. |
| Set Point Adjustment | Screw type with enclosed scale. |
| Factory On Setting | 0.05"wc |
| Factory Off Setting | 0.25"wc |
Description
The Dwyer Instruments 1638-0 is a standard SPDT pressure switch with a 0.05 to 0.25 in H2O range. It monitors pressure changes to open or close an electrical circuit, supporting current loads of up to 15 amps. The switch features a 1/8" FNPT process connection, a steel housing, and a visible set point indicator. It is CSA, FM, and UL Listed.
Shipping
Shipping and dispatch
Shipping method and available services depend on the item and delivery address. Check the product shipping information and checkout for shipping options and charges.
Dispatch times vary by product and supplier. Any supplier dispatch estimate shown is subject to availability. Transit time begins after shipment and is additional to dispatch time.
Freight shipments
Products identified as freight ship by truck. Review the available delivery service and charges at checkout; delivery arrangements depend on the selected service.
Inspection and Damage:
Upon delivery, please inspect the carton and contents for any damage. If you find any damage, document it on the driver's delivery receipt and contact us immediately at support@proreplacementparts.com no later than 24 hours from the delivery time. We cannot accept responsibility for damage that is not noted on the driver's delivery receipt at the time of delivery.
Order Cancellations:
All order cancellations must be requested within 24 hours of placing the order. After this period, our standard return policy will take effect.
Thank you for choosing Pro Replacement Parts. We are dedicated to providing you with the best service and ensuring your orders are delivered in a timely and efficient manner. If you have any questions or need further assistance, please don't hesitate to contact us.
Why Buy From Us?
Exact part numbers. Every listing starts with the manufacturer part number, so you can match it to the part in your equipment before you order. Not sure it fits? Ask us first.
Clear shipping. Check the product shipping information for the shipping method and any supplier dispatch estimate. Shipping options and charges are shown at checkout.
Real people. Call 617-286-6694 (Monday to Friday, 9 AM to 6 PM ET) or email support@proreplacementparts.com with a part number or model number.
Returns. Unopened parts can be returned within 30 days. Electrical and gas parts are final sale once opened. Details are on our Returns & Refunds page.
Warranty/Returns
Your purchase is covered by the Manufacturer’s Limited Warranty.
For return/refund information, please visit our Returns & Refunds page.
No reviews yet. Be the first to review this product!
