Welcome to DG Instruments About Us

For all your instrumentation requirements Shop Products

Dwyer  |  SKU: 1221-M300-W/M

Dwyer Flex-Tube U-Tube Manometer – Fluid Filled

$186.70 $201.90
Shipping calculated at checkout.


These inexpensive manometers measure positive, negative and differential pressures. Dwyer® Flex-Tube® U-Tube Manometers combine the inherent accuracy of the simple "U" Tube with the durability of tough, long-lasting plastic construction. Columns are of .375" O.D. flexible and shatter proof clear butyrate tubing. They are easily accessible for cleaning. Indicating tube is backed by white scale channel to provide maximum color contrast. Scales are extruded high impact polystyrene plastic, formed to hold columns in perfect alignment. Stark white scales have graduations and numbers silkscreen-printed in black for maximum legibility.
    • Measure Positive, Negative or Differential Pressure
    • Smallest Range: 0-200 mmWG; Largest Range: 0-1000 mmWG
    • Tough Long Lasting Plastic Construction
    • supplied with Fluorescein Green Dye Concentrate
    • Options: Magnetic Mounting Clips (1222); Shut-Off Valves (1223);

NB: All prices exclude GST 

*Delivery of this unit must be via Road Freight due to length of item*

Payment & Security

Payment methods

  • Apple Pay
  • Google Pay
  • Mastercard
  • Shop Pay
  • Union Pay
  • Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Frequently Asked Questions

Do I need to use a special fluid with the U-Tube Manometer?

No, fresh clean water is all that is required. You will receive
some dye colour concentrate with the manometer to make it easier to read.