Pasadena Commercial Sensor Calibration

Precision sensor calibration is the foundation of reliable commercial HVAC control. When sensors drift, buildings overheat, overcool, ventilate excessively, or miss indoor air quality targets—driving higher utility bills and avoidable complaints. In Pasadena, where Title 24 performance and occupant expectations are high, our engineering‑driven methods return your BAS and equipment to truth so sequences work as designed and energy spend stays in check.

What we calibrate and verify

• Temperature sensors and thermostats (space, return, supply, mixed air, outdoor air)
• Humidity and dew point sensors for comfort and condensation control
• CO2 and IAQ sensors supporting demand‑controlled ventilation
• Duct static and differential pressure sensors for fans, filters and VAVs
• Airflow and velocity probes for economizers, AHUs and labs
• Economizer and mixed‑air sensors for free‑cooling accuracy
• Occupancy and PIR sensors influencing setback and ventilation
• Refrigeration and hydronic sensors (where integrated with BAS)

We service stand‑alone rooftop units, VAV systems, dedicated outdoor air systems, heat pumps and integrated BAS platforms across offices, education, healthcare, retail and hospitality. Our approach is compatible with equipment and parts supplied through AC PRO.

Our calibration process

• Baseline and diagnostics: Compare live readings to NIST‑traceable references; identify drift, noise and wiring issues.
• Functional testing: Exercise sequences (economizer, resets, alarms) to see how controls interpret sensor inputs.
• Adjustments: Apply offsets, span/range corrections, and re‑terminate wiring where needed; replace failed sensors if required.
• Validation: Confirm stable readings across multiple points and conditions; verify controller scaling and units.
• Documentation: Provide before/after data, instruments used, tolerances, and recommendations.

This method ensures your controls respond to reality—not guesswork—and it shortens troubleshooting time for future service calls.
Result: tighter comfort bands, fewer hot/cold calls, and measurable energy savings.

Documentation, compliance and commissioning support

We deliver clear, audit‑ready records to support facility standards and California compliance needs.

• Instrument traceability and calibration certificates
• Pre‑ and post‑calibration readings with tolerances
• Controller scaling and mapping notes
• Sequence verification snapshots for Title 24 intent
• Corrective actions and preventive maintenance recommendations

Whether you are preparing for retro‑commissioning, pursuing utility incentives, or aligning with ASHRAE 55/62.1, our reports make stakeholder reviews straightforward.

AC PRO compatibility

Work with systems supplied via AC PRO? We do too. Our calibration practices align with AC PRO‑sourced sensors, controllers and accessories, ensuring accurate scaling, wiring integrity and controller set‑up so your parts perform to spec.

Why #1 AC Guys

• 4th‑generation family of engineers with 80+ years in engineering excellence
• Factory‑trained by Fujitsu (Japan), Mitsubishi Elektrik (Thailand), Midea (China), Gree (China) and Hier (China)
• Specialists in commercial and large, complex projects
• NIST‑traceable reference instruments and repeatable procedures
• Healthier indoor air as our core mission—because better data drives better IAQ
• Transparent pricing, clear documentation and respectful on‑site practices
• Local to Pasadena; responsive scheduling across Los Angeles County and nearby regions

Common signs you need calibration

• Frequent hot/cold complaints despite “normal” setpoints
• Economizer never opens or is locked out unexpectedly
• CO2 trends don’t align with occupancy
• Fans hunting or short‑cycling; unstable duct static
• Energy bills rising without equipment changes

Catching these early protects comfort, indoor air quality and your budget. Calibration is a low‑cost lever with high impact.

Service area and scheduling

Based in Los Angeles, we primarily serve Pasadena and the greater Los Angeles County, with regular projects across Orange County, Ventura County and Western Riverside County. We coordinate around tenant hours to minimize disruption and can bundle calibration with filter changes, coil cleaning or controls optimization for maximum value.

Ready to restore accuracy? Contact #1 AC Guys for a commercial sensor calibration assessment in Pasadena. We’ll review your sequences, prioritize critical sensors, and deliver data you can trust—so your building runs the way it was designed to run.

Engineer‑led service. Precision instruments. Measurable results.