Pressure Switches
30Pages

From 2 to 6000 PSI (40 mbar to 400 bar), GEMS Pressure Switches Cover A Wide Range of Applications General, Vacuum, Specialty Field-Adjustable or Factory Set Switches High Proof Pressure Rugged and Dependable GEMS offers a choice of pressure switches, from compact cylindrical models for OEM use, to larger, enclosed units for rugged process applications. These switches are ideal for the filtering process of coolants in the machine tool industry, use in transmissions of off-highway vehicles and as redundant systems with existing monitors such as transducers. Unique Piston/Diaphragm Design A piston/diaphragm design, incorporating the high proof pressure of piston technology allows these switches to operate with the sensitivity and accuracy of a diaphragm design. Repeatability ranges from 0.25 percent to 5 percent of the set point. Many Materials To Choose From Enclosures include aluminum, stainless steel, brass, reinforced plastic and zinc-plated steel. Wetted parts include a diaphragm available in Buna-n, Teflon® coated Kapton®, stainless steel, PTFE, EPDM or Viton® and a pressure port available in stainless steel, brass or zinc-plated steel. PRESSURE SWITCHES Pressure Switch Option Descriptions G: Gold contacts are usually required for low DC current loads (<12 VDC @ 12 mA) associated with TTL input devices. They provide decreased contact resistance, which results in more reliable switching especially in the presence of an oxidizing atmosphere. OF: Wetted Materials are ultrasonically cleaned to remove oil and debris. 10A: 10A option is provided by a microswitch rated 10 Amperes at 250 VAC. This microswitch has a wide movement differential, which results in a larger deadband than listed in the standard catalog pages. IP: Ingress Protection is provided by either an epoxy sealed cap (IP65) or silicon wire seals (IP66). On some models, this option is only available with FS option. RB: Rubber Boot is designed to be cut out for the proper wire or cable size by the customer and sealed with an appropriate sealant in the field. WF: Weatherpack female termination consists of the following Delphi P/N’s:(12045793 Conn “C” Circuit), 12089188 Female Pins and 12015323 Wire Seals. WM: Weatherpack male termination consists of the following Delphi P/N’s: 12010973 Connector, (12010717 Conn “C” Circuit), 12089040 Male Pins and 12015323 Wire Seals. DE: Deutsch male termination consists of the following Deutsch P/N’s: DT04-2P Connector, (DTO4-3P “C” Circuit) 1060-16-0122 Male Pins and W(2 or 3)P Wedgelok. FS: Gems will preset switches to the indicated set point within repeatability limits listed on the specific product catalog page. Visit www.GemsSensors.com for most current information. R: The restrictor option is recommended for hydraulic and pneumatic systems that need a small reduction in pressure pulsations to increase pressure switch life. It is a pressed in part that has an orifice size of 0.045˝ (1.4 mm) SR: The spiral restrictor option heavily dampens pressure pulsations in any hydraulic system, which prevents false signaling and premature wear. It is not recommended for pressure settings below 1500 psig (103 bar) because it slows the response time of the pressure switch depending on fluid viscosity.

INTRODUCTION Selection Guide Pressure Range SPST, SPDT Kapton® Diaphragm Elastomer Diaphragm Kapton® Diaphragm Elastomer Diaphragm SPST, SPDT, DPST, DPDT SPST, SPDT SPST, SPDT SPST, SPDT SPST, DPDT SPST, SPDT SPST, SPDT SPST, Relay or Transistor Plastic Diaphragms* Elastomer Diaphragms* Option K or Standard Teflon® Coated Kapton® (Polyimide) Diaphragm Elastomers offer incredible sensitivity coupled with extremely long life. This results in stable set points over the life of the pressure switch as well as tight deadbands. Their biggest weakness is the increase in modulus (stiffening) that...

PS11 – Ultra-Long Life OEM Pressure Switches 0.75 to 15 psi (52 to 1034 mbar) Factory Set or Adjustable Set Points For low pressure applications, the longevity of our PS11 Series is hard to beat. Their snap-action microswitch resets automatically and meets or exceeds industry standards. The brass housing offers chemical resistance at an affordable price. Specifications Switch* Repeatability Wetted Parts Diaphragm Fitting Housing O-Ring Ingress Protection** Proof Pressure Burst Pressure Approvals Weight, Approximate 5 Amp @ 24 VDC and 250 VAC 1.0 Amp resistive 0.5 Amp inductive @ 24 VDC (-G...

SUBMINIATURE How To Order Use the Bold characters from the chart below to construct a product code. Please reference Notes. PS11 -10 -4MNB -C -HC -XX -XXXX 1 1 Pressure Range Code Insert Pressure Range Code from Table 1, below. 2 Pressure Fitting1 -2MNB = 1/8˝ NPTM Brass -4MNB = 1/4˝ NPTM Brass -4MGB = 1/4˝ BSPM Brass (G type) -4MSB = 7/16˝-20 SAE Male, Brass 3 Circuit -A = SPST/N.O. -B = SPST/N.C. -C = SPDT 5 Options -V = Viton® Diaphragm -E = EPDM Diaphragm -K = Kapton® Diaphragm -G = Gold Contacts (for loads less than 12 mA @ 12 VDC) -OF = Oil Free Cleaned -WF = Weather Pack Connector,...

PS31/PS51 – Kapton® Diaphragm OEM Subminiature Pressure Switch 5 to 300 psi (0.345 to 20 bar) Ideal for Low Temperature Pneumatic Applications Adjustable or Factory Set These compact pressure switches are designed for OEM applications. Made economical with metal blade contacts in lieu of microswitches, these switches feature Kapton® diaphragms. Kapton® polyimide maintains excellent physical properties over a wide temperature range. It also offers superb chemical resistance and has no known organic solvents. The PS31 and PS51 share identical construction and envelope dimensions, with the...

SUBMINIATURE How To Order Use the Bold characters from the chart below to construct a product code. Please reference Notes. 1 Series PS31 or PS51 2 Pressure Range Code Insert Pressure Range Code from Table 1, below. 3 Pressure Fitting1 Brass -2MNB = 1/8˝ NPTM -4MNB = 1/4˝ NPTM -2MGB = 1/8˝ BSPM (G type) -4MGB = 1/4˝ BSPM (G type) -8MGB = 1/2˝ BSPM (G type) -M10B = M10 x 1.0, Straight -M12B = M12 x 1.5, Straight -4MSB = 7/16˝-20 SAE Male -6MSB = 9/16˝-18 SAE Male 5 Electrical Termination -SP = Spade Terminals (standard) -TS = Terminal Screws -FLXX = Flying Leads2 -FLSXX = Flying Leads w/PVC...