Pressure Switch Products D1T, D2T Pressure Switch Single and Dual Terminal Block Diaphragm D1T, D2T Series ** High Reliability High Reliability ** Ideal for Pressure and Ideal for Pressure and V Vacuum acuum ** Dual Switching Dual Switching Cap Capability ability ** T Tamper-Proof External amper-Proof External Adjustment Adjustment ** High Accuracy High Accuracy ** NEMA NEMA 4 4 Barksdale’s D1T & D2T Terminal Block Diaphragm Pressure Switches offer superior accuracy in a robust package, making them the ideal solution to your industrial pressure control needs. These switches are ideal for applications requiring water-tight, NEMA 4 housings, a covered terminal strip and tamper-proof external adjustment. (Factory set models are also available.) With pressure ranges up to 150 psi, these housed diaphragm pressure switches are suitable for use in either positive pressure or vacuum applications. Single and dual circuit models are available. Housed models feature a durable, anodized aluminum enclosure. For applications requiring a highly accurate switch in a durable package, Barksdale’s D1T & D2T Terminal Block Diaphragm Pressure Switches are the ideal choice. Exceeding Your Expectations Through Our People, Products and Performance Pressure Switch Products D1T, D2T Pressure Switch With Barksdale - Pressure’s No Problem As a recognized leader in the manufacture of pressure product solutions, Barksdale pressure switches meet the demanding needs of our cus- tomers. From 29” Hg to 18,000 psi, Barksdale has pressure switches for a variety of applications – from transformers to natural gas compressors to beverage dispensers – and more! Barksdale’s D1T & D2T Terminal Block Diaphragm Pressure Switches provide an eco- nomical solution for your pressure sensing needs. Diaphragm switches accurately control pressures from 30 inches of mercury vacuum to 150 psi posi- tive pressure, and can be factory pre-set upon request. Setpoint adjustment is easily accom- plished by turning the adjustment screws, which are protected by a tamper-resistant cover on Need Something Special? housed models. A variety of available factory If you have special product requirements, we can options allows the diaphragm switches to be con- help. Barksdale specializes in custom design figured to the exact needs of your application. solutions to meet your needs. Our reputation is built on creating custom products for customers Diaphragm Pressure Switch Applications committed to getting exactly what they need. We With its economical design and high repeatability, have design engineers and technical specialists Barksdale’s D1T & D2T Terminal Block who are experts in solving your unique pressure Diaphragm Pressure Switches provide an accu- problems. Our technology and resources are at rate and reliable solution for pressures up to 150 your disposal. psi, making them ideal for use in: • Pump & Compressor Monitoring Need More Information? • Air proving in HVAC Systems Call us. We are only a phone call away. • Engine Monitoring Toll-Free: 1-800-835-1060. • Machine Tools • Hydraulic Power Units • Pneumatics 2 Pressure Switch Products D1T, D2T Pressure Switch Electrical Characteristics All models incorporate Underwriters Approvals Laboratories, Inc. and CSA Listed single UL (optional) All models may be ordered as UL listed. File pole double throw snap-action switching No. E42816). elements. CSA (optional) All models may be ordered as CSA listed Performance Characteristics under Class 3231 02, File LR22355 on Accuracy ± 0.5% of the adjustable range request. Switch PED (European) Compliant to PED 97/23/EC Type SPDT Snap Action; single or dual circuit Environmental Rating 10 Amps @ 125/250 VAC; .5 Amps @ 24 Temperature Range VDC (Class A or H limit switch). Consult Operating -65° to +165°F (-7° to +74°C) sales drawing for ratings of optional limit Storage -45° to +200°F (-43° to 93°C) switches. Adjustment Instructions Physical Pressure Turn adjustment screw counterclockwise to Shipping Weight raise actuation point. Housed Models 2.0 lbs. approximate Vacuum Turn adjustment screw clockwise to Wetted Parts increase setpoint (higher vacuum) Process Fitting 304 Stainless Steel WIRING CODE Diaphragm 17-7 PH Stainless Steel Lead Circuit #1 Circuit #2 Pressure Vacuum Pressure Vacuum Enclosure Anodized Aluminum (housed models) Normally Closed Blue Red Orange Yellow Ratings Common Purple Purple Brown Brown Housed Models NEMA 4 Normally Open Red Blue Yellow Orange Pressure Connection 1/4” NPT Female Electrical Connection Terminal Block through 1/2” NPT conduit Contact Factory for These Options connector NEMA 4X Enclosure Cleaned for Oxygen Service Factory pre-set Six-pin Terminal Block 3 Pressure Switch Products D1T, D2T Pressure Switch Single and Dual Terminal Block Diaphragm D1T, D2T Series  3211 Fruitland Avenue • Los Angeles, CA 90058 • 800-835-1060 • Fax: 323-589-3463 • www.barksdale.com See Barksdale’s Standard Conditions of Sale • Specifications are subject to modification at any time • Bulletin #S0062-A • 01/05 • ©2005 • Printed in the U.S.A. 4