Flow / No Flow detection – FlowJam S

The FlowJam S from Envea (formerly SWR) is a contactless microwave sensor for detecting flow/no flow. The system detects various types of flow and distinguishes between flow, blockages, or standstill. This model is also available with a 4-20 mA output signal for trend purposes.

Operation

The FlowJam S operates using microwaves. These waves are reflected by the material to be detected and registered by the sensor. Using the Doppler effect, the system determines whether movement is present, allowing it to differentiate between flow and blockages, for example. Because microwaves penetrate the material, the system is not affected by buildup, enabling installation on the exterior of (non-conductive) pipes. A process adapter allows the FlowJam to be used in high-pressure or high-temperature environments, and solutions are available for ATEX zones or food-grade applications. Check the product sheet for more details.

Differences Compared to Other FlowJam Models

FlowJam
This is the basic version of the FlowJam and is not ATEX certified. It detects flow/no flow.

FlowJam S
Unlike the basic FlowJam, the FlowJam S is ATEX certified (zone 22) because its electronics are housed separately. This gives the FlowJam S a smaller sensor housing. It detects flow/no flow and is available with a 4-20 mA output signal for trend purposes.

FlowJam Plus
The FlowJam Plus is the successor to the basic FlowJam. In addition to detecting flow/no flow, this sensor provides an extra output signal during no flow, indicating whether the pipeline is full or empty. With optional adapters, the Plus version can also be used in extreme conditions such as high temperatures, high pressure, and ATEX zones.

FlowJam T
This model is specifically designed for flow measurements of solid materials in hose lines with external diameters between 4 and 25 mm.