Description
Product Overview
The Mid-West Instrument Differential Gauge model 120-AA-00-OO is engineered for durability and precision in demanding industrial settings. Its simple, rugged, and compact design measures pressure differentials with a shatter‑resistant acrylic lens that protects the display from impact. The gauge features weather‑resistant construction, allowing reliable operation in harsh environments, and includes over‑range protection to safeguard against pressures beyond its maximum rating. Package dimensions are 5.4 x 3.7 x 3.2 inches, weighing just 11.2 ounces, making it easy to carry and install.
![[Product front view showing all components]](https://www.thrustore.store/wp-content/uploads/2026/06/a66004ecffc64589b16a5c0482e377a9.jpg)
Usage
Designed for technicians, engineers, and maintenance crews, this differential gauge excels in HVAC systems, pneumatic testing, and process control applications. Its compact size fits into tight spaces on machinery, while the weather‑resistant housing ensures accurate readings in outdoor or corrosive environments. Whether you are calibrating equipment on a factory floor or conducting field inspections on pipelines, the gauge provides clear, instant readings for quick decision‑making.
Why Choose Us
Mid-West Instrument has a reputation for manufacturing reliable industrial tools. This gauge is backed by a five‑year limited warranty, reflecting confidence in its build quality and long‑term performance. The combination of a robust acrylic lens, weather‑proof enclosure, and over‑range protection sets it apart from generic gauges that lack these safety features. Choosing this gauge means investing in a tool that reduces downtime and maintenance costs.
Key Features
- Compact, lightweight design for easy handling and installation
- Shatter‑resistant acrylic lens protects the display from drops and impacts
- Weather‑resistant housing ensures accurate readings in harsh conditions
- Over‑range protection prevents damage when pressure exceeds maximum limits
- Five‑year limited warranty provides confidence and reliable after‑sales support
FAQ
What is the maximum pressure this gauge can measure?
The gauge is calibrated to its specified maximum range as indicated in the product specifications; over‑range protection will alert you if pressure exceeds this limit.
Is the acrylic lens replaceable if it gets damaged?
Yes, the shatter‑resistant acrylic lens can be replaced through Mid-West Instrument’s authorized service centers.
Can this gauge be used outdoors?
Absolutely. Its weather‑resistant construction is designed for outdoor and corrosive environments, maintaining accuracy despite exposure to moisture and temperature variations.
What warranty coverage does the gauge include?
The product comes with a five‑year limited warranty covering manufacturing defects and material failures under normal use.
How do I calibrate the gauge?
Calibration should be performed using a certified pressure source and following the manufacturer’s calibration procedure outlined in the user manual.




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