The Rate-Master® Flowmeter line of direct reading precision flowmeters incorporates many unique user features at moderate cost. These low cost flowmeters are ideal for general use.

1211 Handy Roll-Up Manometer with Laboratory Accuracy Dwyer Slack Tube Manometers are as accurate as the finest laboratory "U" gages - yet they are made to roll up compactly for easy carrying and to withstand rough usage. Simply unroll the Dwyer Slack Tube Manometer and set up to read static pressure, vacuum, or differential pressure. Magnetic clips hold it firmly to any steel surface or hang it on a nail. SEE DETAILS FOR MORE

Dwyer's 1212 Gas Pressure Kit For Servicing Gas Appliances. See 1211 Slack Tube Mamometers for alternative sizes. NOTE THIS KIT CONTAINS A 16". A handy, complete kit containing a 16" Slack Tube® Manometer, necessary tubing and connection fittings for checking gas pressures in virtually all gas appliances such as water heaters, furnaces, stoves and dryers. Different range manometers may be specified at corresponding prices. Compared to the cost of purchasing items separately the assembly of component parts into kit form represents substantial savings. What the kit consists of: 1 - #1211-16 Slack Tube® Manometer, reads pressure to 16" water*. 1 - Carrying case, plastic, 8-1/2" x 7" x 3-1/8". 1 - 3/4 oz. Bottle Fluorescein green color concentrate with wetting agent. 1 - 1/8" pipe thread rubber tubing adapters. 1 - 1/8" to 1/4" pipe thread bushing. 1 - 3 ft length 3/16" rubber tubing. 1 - Rubber tubing adapter to fit standard 7/16" diameter spud. *Other ranges available

Dwyer's 1213 Gas Pressure Manometer The "Tube in a Tube" Direct Reading Manometer provides visual indication of pressure with the Series 1213 Gas Pressure Manometer. Designed for use with natural gas, the manometer can also be used to monitor any compatible gases up to 15 inches of water column. Tap water is used as the sensing media and a magnetic clip provides temporary or permanent mounting. Economically priced and made of durable plastic for years of trouble-free service. Includes three feet of vinyl tubing and 1/8" nylon male NPT to barb fitting.

See Detail for PDF and Specifications for more information. 1620 Single and Dual Pressue Gage is one of Dwyer's "Old Faithful Switch" design is still best where highest precision combined with diaphragm sealed leak proof construction and mounting simplicity are required. Model 1626 and 1627 differential pressure switches are identical in design and construction except that Model 1626 has a single electric switch and Model 1627 has dual electric switches. CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.

Try out Dwyer's highest precision 1630 Large Diaphragm Pressure Switches that provides maximum dependability. a visible set point indicator for added maximum convenience. CAUTION: Use Only with Air or Compatible Gages.

1640 Floating Contact Null Switch for High and Low Actuation is a unique electric switch design by Dwyer Instrument, Inc. innovation. The Dwyer® Model 1640 Differential Pressure Switch resembles the Series 1630 switches. The Model 1640, however, is equipped with a single pole, double throw floating contact switch (not snap acting) so it functions as a null switch. CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.

1800 Low Differential Pressure Switches for General Industrial Service, set Points from 0.07" to 85" w.c., Repetitive Accuracy within 2%, UL and CSA listed, FM approved. Essential for industrial environments, small size and low price with 2% repeatability for enough accuracy for all but the most demanding applications. CAUTION: FOR USE ONLY WITH AIR OR COMPATIBLE GASES.