Instrotech News

Instrotech News & Articles

Measuring volumetric flow by means of oscillation

KOBOLD offers their KOBOLD-DOG range of flowmeters that use the unique oscillation principle to measure dry or humid gases even in low pressure applications.

In this measuring procedure, a partial stream of the medium is led into the measuring cell by means of a bypass.  In the measuring cell, the medium flows through a chamber with two flow channels.  A gate allows the stream to flow through either the left or the right channel. The flow creates over-pressure on one side and under-pressure on the other.  The difference in pressure directs the media stream to the other side.  This results in the stream between the two sides oscillating, which sets the medium in the connecting channel into vibration. The frequency of the oscillation is directly proportional to the flow speed.  A detector determines the oscillation in the connecting channel and converts it into an electrical signal.  The signal is processed further in the downstream electronic unit and then displayed or output in another form.

Now you can measure very low flows of liquids and gasses

KOBOLD has on offer model KDF/ KDG, low volume flow meters and monitors, now available with shorter (90mm) installation length.

The Kobold KDF / Kobold KDG operate on the suspended float principle with a stainless steel ball, and are available in special versions for liquids and gases (air). The The Kobold KDF / Kobold KDG, with stainless steel housing are installed vertically with flow direction from bottom to top via 1Ž4” thread or hose connection of 8 mm diameter. The needle valve enables an optimal setting of the flow rate. The respective flow rates can be read quickly and easily by a direct view of the measuring tube made out of rugged borosilicate glass.

Precision Filter Monitoring

KOBOLD, represented locally by Instrotech, has on offer their type PMP differential pressure sensor, specifically designed for monitoring filters for air or non-corrosive/aggressive gases, that measures the pressure difference before and after the filter chamber. The compact microprocessor controlled unit is housed in a robust plastic casing with an enclosure class of IP65.  Two hose connections allow for easy connection to the process before and after the filter.

Accurate relative humidity and high temp measurements in harsh environments

Many industrial processes involve high temperatures, often combined with harsh and corrosive environments. These types of conditions are not normally the best environment for precision instrumentation to be placed, as the sensors and equipment can degrade quickly.

Vibrating limit level detection

KOBOLD has on offer their Kobold NSV level monitors to measure low-density (powdery), fine-grained bulk solids, such as plastic granules, cement, and food like flour, sugar and animal feed.  The Kobold NSV level monitors work by the vibrating fork principle.  The fork, specifically designed for use in bulk solids, continuously vibrates, and when it is covered by a medium, the vibration behaviour changes. When the Kobold NSV level monitors detects this change, it is displayed on a red LED. An additional relay output is provided for signal transmission.

Measuring Air Velocity in HVAC Systems

Kobold has the compact KAH Series airflow velocity transmitters, ideal for accurate ventilation control in Building Automation Systems (BAS) and heating, ventilation and air-conditioning (HVAC) applications.