Kleinn Sealed Tank Mount Pressure Switch/ 1/4In M NPT/ 90 PSI On/ 120 PSI Off - 2121

WHY CHOOSE THE MODEL 2121?

• PRECISION-TUNED CALIBRATION: Engineered to kick in at 90 PSI and cut out at 120 PSI. This ensures your tank is always primed for massive air horn blasts.
• BATTLE-READY SEALED DESIGN: The fully sealed housing slams the door on moisture, dust, and road debris, making it the only choice for rugged under-vehicle mounting.
• ERROR-PROOF WIRING: With non-polarized leads, there is no "wrong" way to wire it—meaning faster installs and zero risk of wiring-induced failures.
• TOTAL SYSTEM FORTIFICATION: Designed to command a 12V ignition signal to a 40-amp relay, shielding your compressor from electrical burnout and maximizing its lifespan.

THE VERDICT:Engineered as the definitive 120 PSI control component for light-duty configurations, the Model 2121 eliminates pressure regulation guesswork while offering durable, weather-sealed structural protection.

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)

⚠️ MODEL 2121 COMPATIBILITY

This pressure switch is specifically designed for use with Kleinn 120 PSI systems. To ensure the perfect fit for your application, match the pressure switch to the 120 PSI Rating of your compressor.

Kleinn Air Systems compatible with the 2121:

• Model 6260: 120 PSI | 10% Duty Cycle | Ultra Light-Duty

Kleinn Systems compatible with the 2121:

• Universal ProBlaster™ Horn Kits: Models HK1, HK2, HK2-1
• Vehicle-Specific Kits: JEEPKIT-1, TJ102

⚠️ Pro Installation Tip: Relay Protection

For maximum reliability and long-term performance, power this switch via an ignition source of 10+ amps. This MUST be used in conjunction with a 30/40 amp relay (like the Kleinn Model 340) to shield internal contacts from high-amperage surges during compressor startup.

⚠️ Critical Maintenance Tip: Fight Corrosion

Pressure switches are high-performance wear items. To maximize longevity, use the Kleinn Snorkel Air Filter Relocation Kit included with all of our air compressors. By routing your air intake inside the vehicle cab, you significantly reduce moisture intake and effectively double the service life of your pressure switch.