Model 2121: Sealed Tank Mount Pressure Switch - 1/4" NPT (90 psi On / 120 psi Off)

  • Model 2121 Pressure Switch - Kleinn Automotive Accessories - KL 2121

KL 2121

$32.95
$32.95 $32.95

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PROP 65 WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

Model 2121: Sealed Tank Mount Pressure Switch - 1/4" NPT (90–120 PSI)

AUTOMATED PRECISION

The Kleinn Model 2121 is the heavy-duty "brain" of your air management. It takes absolute control, automatically signaling your compressor to kick ON when levels drop and OFF before exceeding safe limits. Engineered specifically for Kleinn 120 PSI Systems, it features a fully sealed housing and heavy-duty 12-gauge wires to thrive in the most extreme environments.

CRITICAL SAFETY ARCHITECTURE

Never compromise your rig. For maximum performance and total system protection, the 2121 MUST be paired with a 40-amp relay (Model 340) and a safety relief valve (Model 52145).

FAILSAFE DESIGN

This essential combination maintains strict pressure limits. If the switch eventually wears, the safety relief valve acts as your early warning system—Model 52145. If you hear the safety valve releasing repeated, high-pressure blasts of air, it is a definitive signal that your pressure switch has failed to cut off power that feeds the compressor. This alert tells you to immediately disconnect power to the compressor and replace the pressure switch before system damage occurs.

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.

PRESSURE SWITCH & SAFETY VALVE CONFIGURATIONS

Compressor Model Pressure Switch Cut-Out Pressure Safety Valve
6270RC 2121 120 PSI 52145
6270RC 2131 130 PSI 52155
6275RC 2151 150 PSI 52175
6350RC 2151 150 PSI 52175
6450RC 2151 150 PSI 52175
6650RC 2165 200 PSI 52250

PRESSURE SWITCH SPECIFICATIONS

2121 Pressure Switch Details
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

INSTALLATION INSTRUCTION LINKS:

Model 2121: Sealed Tank Mount Pressure Switch - 1/4" NPT (90 psi On / 120 psi Off)

$32.95

Does it come with a warranty?

Kleinn Automotive Accessories Limited Warranty

Kleinn Automotive Accessories stands behind the quality and craftsmanship of our products. Our products are covered against defects in materials and workmanship when properly installed and used under normal operating conditions, subject to the terms below.

One-Year Limited Warranty

Unless otherwise specified, Kleinn Automotive Accessories products are covered by a 1-year limited warranty from the original date of purchase.

This warranty applies to the original purchaser and covers defects in materials and workmanship under normal use.

If a product is determined to have a covered warranty defect, Kleinn Automotive Accessories will, at its discretion, repair or replace the defective product or component.

What Is Not Covered

This warranty does not cover damage or failure resulting from:

  • Improper installation
  • Misuse, abuse, or improper operation
  • Use outside the product's intended application or specifications
  • Modification or alteration of the product
  • Accidents or physical damage
  • Electrical damage
  • Environmental damage or exposure
  • Normal wear and tear

Kleinn Automotive Accessories is not responsible for installation or removal charges, diagnostic fees, labor costs, vehicle downtime, loss of use, or other incidental or consequential expenses associated with warranty service.

Warranty Claims

To request warranty service, email warranty@kleinn.com with the following information:

  • A copy of your original sales receipt or proof of purchase
  • Your full name
  • Email address
  • Telephone number
  • A brief description of the issue

A Kleinn representative will review your claim and may first attempt to resolve the issue through technical support.

If the product needs to be returned for inspection, Kleinn will provide a Return Authorization (RA) number and return instructions. Products should not be returned without prior authorization.

Once received, the product will be inspected to determine whether the issue is covered under warranty. If a covered defect in materials or workmanship is confirmed, Kleinn will, at its discretion, repair or replace the defective product or component.

If inspection determines that the product does not have a covered warranty defect, the product may be returned to the customer, and the customer will be responsible for applicable return shipping costs.

This limited warranty gives you specific legal rights. You may also have other rights, which vary from state to state.

Kleinn Automotive Accessories
4045 N. Highway Drive, Tucson, AZ 85705
Tel (520) 579-1531

What's the returns policy?

How To Return An Item

Your item must be in its original unused condition to be returned, unless there is a manufacturer defect. You must return the item within 30 days of your purchase.

1. Please email support@kleinn.com to request a refund and we will assign you a Return Authorization #.

2. Mail your returned item to:
Kleinn Automotive Accessories
Returns Department
4045 N Highway Drive
Tucson, AZ 85705

3. Include in your package a signed letter stating the reason for your return and the original receipt.

Return Non-Exceptions

Merchandise that has been worn, used, or altered will not be accepted for return or exchange.

Restocking Fee

All returns are subject to a 15% restocking fee, which will be deducted from your refund. If shipping and handling fees were applied to your order, they are non-refundable.

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