Go to GlobalSpec.com Home
 

Newsletter   FREE GlobalSpec e-Newsletters
Receive the latest news, trends, and technology relevant to your work.
(See Titles)

Liquid Leak Detectors

Find Liquid Leak Detectors Manufacturers

Find Liquid Leak Detectors by Specification:
More Specifications >>

About Liquid Leak Detectors

Liquid leak detectors sense when a liquid is leaking from a pipe, tank, or other receptacle. With most liquid leak detectors and fluid monitoring systems, an audible alarm or visual indicator alerts personnel based upon an accumulation of liquid, pressure difference, or change in flow. When selecting liquid leak detectors, leak detection method is the most important parameter to specify. Detectable liquid types, liquid features, detector features, and output options are also important considerations. Water, corrosive fluids, and petroleum-based products are examples of detectable liquid types. Detectable liquid features include foam or bubbles, dirty liquids, and opaque liquids.
 
There are many different types of liquid leak detectors. Devices that rely upon electrical conductivity or resistance use a low-voltage applied across separate electrodes. Liquid leak detectors with electrochemical sensors output an electrical signal, but use a selective chemical sensor. Mass balance leak detection devices or flow metering is based on the difference between inflow and outflow meters. Mechanical float switches or relay contacts use sealed reed switches in a stem with a permanent magnet installed in the float. As the float rises or falls, a switch is activated. Mechanical line leak detectors are also available. These fluid monitoring systems use pressure sensing, a piston operated valve, or pressure vacuum switch to indicate leakage in pressurized piping systems.    

Liquid leak detectors include optical leak detectors, positive pressure devices or vacuum sensors, and ultrasonic leak detectors. Optical leak detectors use optic sensors and optical refraction to detect the presence or absence of fluid. Often, light emitting diodes (LEDs) are used as the light source. Positive pressure sensors or vacuum sensors are designed to detect pressure changes in the interstitial space of double-walled tanks. Ultrasonic leak detectors are also available. These liquid leak detectors use mass and/or microviscosity alterations of acoustic wave propagation. They detects the ultrasonic noise created by gas moving through a small orifice, or recognize the attenuation and dielectric properties of the liquid or air present (piezoelectric SAW devices).

More >>

Other Topics You Might Be Interested In


Engineering Web: Liquid Leak Detectors

Pages: 1 - 3 of 75

HIGHSIDE CHEMICAL 24010 Leak Detector, Liquid

See Grainger Industrial Supply Profile & Catalog
Scientific Instrument Services, Inc. (SIS) Home Page
NEW: SIS™ Direct Replacement Filament for the Amatek/Dycor RGA Leak Detectors and Quadrupoles (p/n 95381VE), which tests have shown increase
ASTM E165 -09 Standard Practice for Liquid Penetrant...
for Fluorescent Liquid Penetrant Examination Using the Lipophilic Post-Emulsification Process E1209 Test Method for Fluorescent Liquid Penetrant
See ASTM International Information
More >>

Part Numbers for Liquid Leak Detectors

Part # Distributor Manufacturer Product Category Description
3TA75 Grainger Industrial Supply HIGHSIDE CHEMICALS A/C Refrigeration Accessories Leak Detector,Liquid
View Specifications
Supplier Data Sheets
Sensors, Transducers and Detectors Home