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Kleinn 2121 is the Model 2121: Sealed Tank Mount Pressure Switch - 1/4" NPT (90 psi On / 120 psi Off). Match the exact manufacturer part number, configuration, voltage, pressure, dimensions, connections, included components, and vehicle application before ordering.
Key Features
- On: 90 PSI; Off: 120 PSI; Note: 5% tolerance standard; The use of a relay is recommended; 20 amp max load.
Fitment
| Fitment Status | Universal only by exact specifications |
|---|---|
| Required Verification | Voltage, pressure, flow, duty cycle, dimensions, ports, air-line size, wiring, mounting, and companion components |
Specifications
| Brand | Kleinn Air Horns |
|---|---|
| Manufacturer Part Number | 2121 |
| Product Type | Air System Pressure Switches |
| Fitment Type | Universal |
| Condition | New |
| GTIN | 819147010908 |
| Part Number | Model 2121 |
| Warranty | 1-Year |
| Pressure On / Off | 90 PSI On / 120 PSI Off |
| Wiring | Two 12-Gauge non-polarized leads |
| Safety Valve Compatibility | Use Model 52145 |
| Tank Fitting Size | 1/4" M NPT |
| Protection | Sealed Design for Moisture Resistance |
| Compatible Relay | Model 340 40-amp SPDT 12v Auto Relay |
What's Included
- (1) Model 2121 Sealed Tank-Mount Pressure Switch
- (2) Heavy-Duty 12-Gauge Non-Polarized Wire Leads
- (1) 1/4" NPT Male Fitting (Pre-applied Thread Sealant)
About Kleinn Air Horns
Kleinn develops vehicle-specific and universal train horns, air horns, onboard-air systems, compressors, tanks, valves, controls, and remote-start systems. Every pressure, electrical, dimensional, and vehicle requirement remains exact-part specific.
Related Kleinn Air Horns Products
- Shop all Kleinn Air Horns products
- Kleinn Sealed Tank Mount Pressure Switch/ 1/4In M NPT/ 100 PSI On/ 130 PSI Off
- Kleinn Sealed Tank Mount Pressure Switch/ 1/4In M NPT/ 110 PSI On/ 145 PSI Off
- Kleinn Dash Mount Analog Air Pressure Gauge/ 0-250 PSI - 1/4In M NPT Inlet
Frequently Asked Questions
What must match before installing Kleinn 2121?
Confirm voltage, pressure, flow, duty cycle, port and air-line sizes, dimensions, mounting orientation, wiring load, and compatibility with every connected component.
Is Kleinn 2121 compatible with my existing air system?
Match the exact voltage, pressure range, duty cycle, port thread, air-line diameter, current draw, dimensions, and mounting requirements. Similar-looking components are not automatically interchangeable.
What should be checked after installing Kleinn 2121?
Leak-test every pneumatic connection, verify electrical protection and operating pressure, secure all wiring and air line, and recheck mounting hardware after the first operating cycle.
Installation Instructions
Confirm Kleinn part number 2121 and the complete application before beginning. Mount every component in the specified orientation, use correctly sized fused wiring and protected grounds, route air line away from heat and moving parts, seal only the approved threads, leak-test the system, verify cut-in and cut-out pressure, and confirm safe operation before driving.
Kleinn Air Horns
Kleinn automotive air horns and onboard air systems deliver the sound, stored air, and vehicle-specific hardware needed for truck, Jeep, SUV, and off-road builds. Shop complete Kleinn horn kits, direct-fit onboard air systems, standalone air horns, 12-volt compressors, air tanks, valves, pressure switches, gauges, fittings, controls, and compatible remote-start systems. Use the year, make, and model filter when shopping vehicle-specific kits, then confirm the exact manufacturer part number, engine, body configuration, mounting space, electrical requirements, operating pressure, tank capacity, and included hardware. The live assortment covers popular Ford F-150, Raptor, and Super Duty; Chevrolet Silverado and GMC Sierra; Ram trucks; Jeep Wrangler and Gladiator; Toyota; Nissan; Infiniti; and universal applications. What Kleinn Air Horns and Onboard Air Systems Cover This collection includes complete air-horn packages and the individual parts needed to build, upgrade, or service a pn...
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