The Optimeter™ OD Series Differential Pressure Gauge is a precision, power-free instrument engineered for continuous monitoring of positive, negative, and differential pressure in HVAC and building systems. With a slim flush-mount profile, robust IP67 construction, and an extensive selection of over 60 pressure ranges, the OD Series delivers dependable performance for filter monitoring, airflow balancing, fan performance verification, and cleanroom pressure control—supporting energy efficiency, system reliability, and ASHRAE-compliant indoor air quality.

Categories: FLOW and ENERGY

Specification	Details
Measurement Type	Positive, Negative, or Differential Pressure
Media	Air and non-corrosive, non-combustible compatible gases
Accuracy	±2% standard; up to ±1% optional
Pressure Range	From ultra-low pressure to -0.7 to 1 bar (-70 to 100 kPa), 60+ ranges available
Dial Size	4 in (101.5 mm) diameter
Mounting	Flush or surface mount (vertical orientation)
Connections	Dual 1/8 in NPT female pressure ports (High / Low)
Housing	Die-cast aluminum with PC cover
Optional Housing	ABS polymer (lightweight, corrosion-resistant, cost-effective)
Environmental Protection	IP67
Operating Temperature	5°F to 140°F (-15°C to 60°C)
Power Requirement	None (mechanical, power-free operation)
Compliance	RoHS II (EU 2011/65/EU), ASHRAE 90.1 & 62.1 support
Typical Applications	Filters, ducts, fans, cleanrooms, room & building pressure

The Optimeter™ OD Series Differential Pressure Gauge