Description
Dwyer A-350 Aspirator Bulb Overview
The Dwyer A-350 Aspirator Bulb is a dependable accessory designed to support accurate air sampling and psychrometric measurements in HVAC applications. Engineered by Dwyer Instruments — a trusted name in instrumentation — this aspirator bulb provides the consistent airflow needed to ensure precise readings when used with compatible sling psychrometers or wet/dry bulb thermometers.
Key Features
- Designed for use with Dwyer sling psychrometers and compatible air-sampling instruments
- Provides steady, controlled airflow over sensing elements for accurate wet/dry bulb readings
- Durable rubber bulb construction for long-lasting, repeated use in the field
- Compact and lightweight — easy to carry and operate with one hand
- Simple squeeze-and-release operation requires no batteries or external power
- Ideal for HVAC commissioning, comfort analysis, and indoor air quality assessments
Applications
- HVAC system commissioning and performance verification
- Relative humidity and dew point measurement support
- Indoor air quality (IAQ) testing and diagnostics
- Psychrometric analysis in commercial and residential environments
Why Choose the Dwyer A-350
Dwyer Instruments has been a leader in measurement and control instrumentation for decades. The A-350 Aspirator Bulb reflects that heritage of quality, offering HVAC technicians a reliable, low-maintenance tool for everyday field use. Its straightforward design minimizes downtime and keeps your measurement workflow efficient.









