Dwyer Instruments Inc. · Electronic Components
1638-0
Switch, Pressure
Part Number1638-0
ManufacturerDwyer Instruments Inc.
LifecycleStocked
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-720-1481 (NSN)
Federal Item NameSWITCH,PRESSURE
Federal Supply Class5930 — Switches
Contact Voltage Rating In Volts120.0 AC AT SEA LEVEL SECOND VOLTAGE
Contact Adjustment TypeEXTERNAL ACTUATION POINT SCREW WITH SCALE
Terminal TypeTAB W/SCREW
Style DesignatorCYLINDRICAL
Thread Series DesignatorNPT ALL PRESSURE CONNECTION
Longest Vertical Distance Between3.000 INCHES NOMINAL
Longest Horizontal Distance Betwee2.000 INCHES NOMINAL
Mounting Facility PatternFOUR POSITION RECTANGULAR
Mounting MethodBRACKET(S)
Overall Length6.500 INCHES NOMINAL
Thread Quantity Per Inch27 ALL PRESSURE CONNECTION
Pressure TypeDifferential
RohscompliantYES
Sensor MountingFlange
Switching Current Max15 A
Hazardousfalse
RohsphthalatescompliantYES
Deadband Min-
Product Range1630 Series
IscanonicalY
Switching Current Dc Resistive-
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is 1638-0 available?
We can source 1638-0 even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is 1638-0 by Dwyer Instruments Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 1638-0 has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like 1638-0?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for 1638-0?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.