Gage Fluids

Fluids for Dwyer Products

Gage fluids in the 1 ounce size are furnished in unbreakable plastic dispenser type bottles. Larger sizes are supplied in plastic bottles with screw caps. CAUTION: Use only Dwyer fluids in Dwyer gages.

Red Gage Fluid, .826 sp. gr., is the standard fluid for use in inclined manometers, "D" type vertical manometers and all Dwyer gages using red fluid.

Blue Gage Fluid, 1.910 sp. gr. For special instruments and Mark II Models 26 and 28.

Fluorescein Green Color Concentrate, water coloring agent. Not to be used full strength. Add 3/4 oz to a quart of distilled water. Contains a wetting agent to improve the meniscus characteristics. Use in vertical manometers only.

Click here, if you require a Safety Data Sheet for the Fluorescein Green Concentrate, Blue Gage Fluid, Violet Gage Fluid or the Red Gage Fluid.

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Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

Model Description Usually Ships* Price Order
Ships: Same Day
Price: $9.30
1 oz dispenser bottle of red gage fluid, .826 sp. gr. Same Day* $9.30 Order
Ships: Same Day
Price: $18.00
4 oz bottle of red gage fluid, .826 sp. gr. Same Day* $18.00 Order
Ships: Same Day
Price: $40.25
1 pt bottle of red gage fluid, .826 sp. gr. Same Day* $40.25 Order
Ships: Same Day
Price: $75.50
1 qt bottle of red gage fluid, .826 sp. gr. Same Day* $75.50 Order



We are using a Durablock inclined manometer with a range of 0-0.25" of water. What is considered a normal response time to steady state? We are seeing times of 1 minute whereas the manual states 'a few seconds'. Gage fluid is well beyond the recommended three years. Do I need fresh (i.e. new) gage fluid? My supply is as old as what's in the manometer.
The manometers have a response time that is dependent on the length of tubing, so a response time of a minute is not uncommon. You may want to check your fittings to make sure there is not a clog present. The gage fluid has a lifespan of three years before the inherent properties start to change, so it is suggested to replace it. A one ounce bottle of fluid is p/n A-101.
Model 1212. How much fluid mixture is required? What is the best method to fill this unit?
A 1 oz bottle of A-126 Fluorescein green color concentrate is added to a quart of distilled water. Remove a tubing connector from the manometer and pour the mixture in to mid-point level. Shake the manometer to remove air bubbles and slide the scale so the zero mark is in line with the meniscus of the two fluid columns.
can you dilute the red dye for the manometer with distilled water?
The red gage fluid has a specific gravity of .826. If you dilute it with distilled water you will change the specific gravity and it will not work in instruments that require the red gage fluid.

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