Description

Transit Time Technology

Transit Time Flow Meters feature the most advanced non-invasive flow measurement technology available. These meters provide a low cost system with unsurpassed accuracy and versatility.

The Transit Time Flow Meter utilizes two transducers which function as both ultrasonic transmitters and receivers. The flow meter operates by alternately transmitting and receiving a frequency modulated burst of sound energy between the two transducers. The burst is first transmitted in the direction of fluid flow and then against fluid flow. Since sound energy in a moving liquid is carried faster when it travels in the direction of fluid flow (downstream) than it does when it travels against fluid flow (upstream), a differential in the times of flight will occur. The sound's time of flight is accurately measured in both directions and the difference in time of flight calculated. The liquid velocity (V) inside the pipe can be related to the difference in time of flight (dt) through the following equation: V = K*D*dt, where K is a constant and D is the distance between the transducers.

FSD32 Specifications

Mounting method
V or Z method mounted to outside of pipe by means of steel bands, nylon belts or steel wire
Straight pipe length
Upstream side, 10d or more, downstream side, 5d or more (d = inside pipe diameter).
Signal cable
RG-58 or RG-58A/U, 50 ohm coaxial cable
Cable length
Standard length 16 ft., maximum length 1000 ft. (300m)
Connection
Converter: BNC connectors (female). Detector: BNC connectors (female).
Pipe diameter range
2.0 to 16 in. (50 to 400mm)
Operating temperature range
-40 to 390°F (-40 to 200°C)
Ambient temperature range
4 to 140°F (-20 to 60°C)
Ambient humidity
Less than 100% RH
Environmental rating
NEMA 3 (IP52)
Material
Stainless steel, housing, aluminum alloy/high impact plastic mounting bracket.
Dimension (WxHxD)
20.86 x 2.05 x 1.30 in. (530 x 52 x 33mm)
Dimensions include rail assembly and transducers.
Weight
3.53 lbs. (1.6 kg)

This set of transducers includes mounting straps, silicone grease and cables.