Pressure Measurement & Control


Pressure transmitter no larger than a bee

November 2017 Pressure Measurement & Control

Keller has introduced its smallest fully functional digital combination transmitter for pressure and temperature – the Series 4 LD. Measuring a mere 11 mm in diameter (the same length as a worker bee), the housing contains the sensor technology, the mathematical compensation coefficients, the digital signal processing as well as the I2C interface for simple, loss-free integration into higher-level systems.

Made of stainless steel, the housing not only acts as a Faraday cage but also offers appropriate protection against electromagnetic radiation and all potential environmental influences. All the electronic components are accommodated in a laser-welded stainless steel housing filled with silicone oil. Keller’s Chip-in-Oil technology means extremely short signal paths with exceptionally high impact and vibration resistance.

Nine standard measurement ranges extend from 1 to 1000 bar (abs) with a compensated temperature range of -10 to 80°C. Accuracy is rated as better than 0,15% FS, and a total error band of less than 0,5% FS is attained between 0 and 50°C. The temperature measurement accuracy is 2 K. Transmitters in the LD series are optimised for battery-powered applications, for example, during A-to-D conversion, current consumption is 1,5 mA, dropping to 0,1 μA in ‘idle’ mode. The supply voltage range of 1,8-3,6 VDC corresponds to a normal microprocessor environment.

With a diameter of just 11 mm, the Series 4 LD is the smallest of four versions. Larger models measuring 15, 17 and 19 mm in diameter are also available for relative pressure measurements: they offer an additional temperature range (-40-110°C) without changes to the electrical characteristics.

For more information contact Instrotech, +27 (0)10 595 1831, [email protected], www.instrotech.co.za



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

VEGA handles the pressures of water treatment systems
VEGA Controls SA Pressure Measurement & Control
A water treatment system for a major metropolitan area in the Midwestern United States demands careful monitoring and management of processes across its sprawling network. Choosing VEGA for its process automation needs meant more than just obtaining precise and reliable pressure sensors.

Read more...
Monitoring the health of systems
SA Gauge Pressure Measurement & Control
Pressure and temperature gauges are vital instruments in various industries. However, they are susceptible to failures that can compromise their accuracy and reliability. When these gauges fail, the consequences can be severe.

Read more...
Enhancing beer brewing precision
VEGA Controls SA Pressure Measurement & Control
Brewing beer is a complex process that requires utmost precision in every step. To ensure precision, it is crucial to measure and control the pressure and point levels in the wort kettle and hops dissolver. Using VEGA instrumentation can offer numerous benefits to breweries.

Read more...
Custom solutions for pressure measurement
Instrotech Sensors & Transducers
Wherever pressure sensors are needed, a solution can normally be found in the Keller product catalogue. However, there are often great benefits to optimising a product specifically for integration and use in complete existing systems.

Read more...
Greener mining through water management strategies
VEGA Controls SA Pressure Measurement & Control
Water scarcity is a pressing concern in South Africa, leading to the establishment of stricter regulations on water discharge and management. To promote greener mining operations that minimise environmental impact and optimise resource utilisation, responsible dewatering practices are essential.

Read more...
Pressure sensors for hydrogen applications
Instrotech Pressure Measurement & Control
Keller manufactures isolated piezoresistive pressure sensors. The great advantage of the piezoresistive measuring principle is its high stability.

Read more...
A new approach to milk processing
VEGA Controls SA Pressure Measurement & Control
Ensuring the quality and safety of milk throughout the production process is of the utmost importance in the dairy industry. Process instrumentation plays a vital role in this stage by providing accurate measurements of level, pressure and point level to guarantee optimal storage conditions.

Read more...
OEM high-pressure transducer with maximum long-term stability
Instrotech Pressure Measurement & Control
Instrotech is offering KELLER 10LHP, the flagship OEM pressure transducer in the KELLER product portfolio, which exemplifies the highest standards.

Read more...
Sensor technology for cartonboard machine for paper and packaging
VEGA Controls SA Pressure Measurement & Control
Paper and packaging specialist, LEIPA undertook a comprehensive modernisation project, combining three stock preparation lines into one, and making investments in new plant components and extensive automation technology. Because of the good experiences the company had already had with VEGA sensors, those responsible for planning and maintenance decided in favour of the VEGABAR 82 pressure transmitter as the standard instrument for level and pressure measurement in the new stock preparation system.

Read more...
Pressure measurement without risk of contamination
WIKA Instruments Pressure Measurement & Control
Injectables are among the most sensitive products in the pharmaceutical industry. Sterility is essential during production. For this reason, a manufacturer of biopharmaceuticals decided to implement the pressure monitoring of its processes with hygienic instruments from WIKA.

Read more...