WELCOME TO KELLER H2O
Long lasting, cost-effective solutions for water-related applications, integrating our customers’ know-how with KELLER’s H2O-expertise.
i2O provides a suite of smart network solutions to help water utilities respond cost effectively to the major challenges they face the world over. Actionable insight and automatic optimisation rely on timely and accurate data. KELLER provides pressure sensing product best suited to the requirements of high precision at a wide range of points of interest within the network.
KELLER had been delivering compact sensor headers to i2O since 2008 for use in its pressure loggers. In 2012 i2O started to develop a new range of pressure loggers and worked with KELLER to integrate the D-Line PA-20D pressure transmitters into the new products. A compact customised housing was developed by i2O, in conjunction with KELLER development, that incorporates a quick release coupling and allows the transmitter to interface directly with the circuit board, allowing a modular build that aids assembly of the product.
By utilising the I2C bus interface of the transmitter, pressure readings can be read directly into the logger from the transmitter. This means that no analogue circuitry is necessary within the loggers. To achieve the high accuracy requirements of i2O over a temperature range requires specialised calibration by KELLER that is programmed directly into the transmitter during manufacture.
This enabled i2O to bring to market an accurate, reliable and affordable logger which delivers timely and valuable data that its clients can rely on for decision making.
The success of this project is not only based on technical advantages, it is also characterised by the very close working relationship between two highly competent companies and the customer's direct contact with the developing department, manufacturer and representative.
Customization of the digital manometer LEO record for a SETEC application of a waterproof pressure recorder body manufactured in stainless steel. The devices are available for the direct installation on above- and underground hydrants.
A large urban water supply and distribution system requires a competent design, a substantial investment, professional management, permanent maintenance and, from time to time, a hydraulic analysis of current and likely future problems. Hydraulic network analysis, based on calibrated models done by real measured flow and pressure, can improve the efficiency and performance of the water supply and distribution system. Wasting less energy by inefficient water transport pumping and inadequate reservoir operation will reduce operating costs.
Any hydraulic water supply model has to be verified by subjecting the real network to known operating conditions and comparing calculated and measured flow rates and pressure in order to detect significant data errors. In a low load, night-time situation, all measured hydraulic grades (elevations plus pressures) must add up to nearly the same quasi-hydrostatic values. Discrepancies would indicate errors in elevation data or large unknown leaks. In a high load situation, induced by hydrant discharges or other suitable means, the hydraulic resistances of the main network pipes are checked and hydraulic grades indicate hydraulic blockages.
Field measurements are taken as part of data collection. Taking field measurements involves testing and recording the performance of various system components, recording values for pressure, flow, water consumption to determine real pipe-roughness coefficients. These measurements are used as a supplement to and first check for information provided by water-system records and personnel during the initial stages of data collection.
KELLER Data Loggers evenly spread over the network record synchronized real pressure values used for computing and fine tuning of realistic pipe roughness values as well as to find punctual resistances (partly closed valves; …) for optimal agreement between measured and calculated hydraulic grades for Roughness Calibration.
A verified and calibrated network model may be used to detect and correct hydraulic problems in existing networks and to avoid such problems when designing future network extensions.
The fish farm Villitaimen Osuuskunta in Kemijärvi (Lapland) grows several kinds of fish and sells them to hydroelectric power stations. The whole water supply at the fish farm is guaranteed by hydrostatic pressure, as the farm doesn’t use any water pumps. The water flow is regulated manually, whereas KELLER PAA-36 X W level probes monitor the water’s level and temperature. A GSM-2 is installed in the screen well and sends data to a cell phone via SMS informing on the water level and temperature.
Fish tanks for the grown fish.
A PAA-36 X W KELLER level probe combined with a GSM-2 are installed in the screen well, measuring the water level and temperature. The GSM-2 is responsible for sending out data on tank filling levels to a computer in the main building of the farm once a day. With that data information on the water flow and amount of dissolved oxygen is given and the dam can be manually regulated.
The screen well can sometimes clog with various objects swimming in the river and cause the water level to drop. In that case the GSM-2 sends out an alarm (SMS, FTP i or Email communication) to an employee’s cell phone.
GSM-2 installed in the screen well
Installing the tube for the PAA-36 X W
The complete installation with external antenna. In the background the farm’s main building housing the fry and the mother fish.
As the farm depends on hydrostatic pressure alone, a level probe is the perfect solution to guarantee its existence and to ensure that its processes run as smoothly as possible.
Reliable pressure measurements in tough environments. Water distribution systems form the backbone of modern civilisation. Huge volumes of water have to be able to travel the long distance between their source and the end consumer efficiently and reliably. Not only can leaks in the distribution system lead to the valuable liquid being lost – escaping water can also alter the subsoil, necessitating costly repairs. Leak-tight pipelines are thus a key part of a functioning supply system that delivers value for money.
When new distribution pipelines are manufactured, therefore, their leak-tightness is tested and documented right from this early stage. The verification process, generally known as a pressure test, requires the pipelines to withstand pressure of 16 bar for an hour. The manometer’s display screen enables employees to track pressure levels on site throughout the test. A significant drop in pressure during the test indicates a leaking pipeline, which can be fixed while still at the production stage.
Once the measurement process is complete, a computer is used to read off the measurements recorded by the manometer, plot them on a graph and make them available to the end customer. KELLER provides the necessary software free of charge.
The on-site pressure test requires a sturdy, reliable and easy-to-use device that can record both pressure and temperature (temperature fluctuations affect the pressure in the test pipeline) autonomously for an extended period of time. BRINER AG, a leading service and retail company for construction-related industries based in Winterthur, Switzerland, has been using KELLER’s LEO Record autonomous datalogger i for this purpose for many years with great success.
“The LEO Record is so easy to operate that even temporary staff can use it unsupervised after a brief introduction”, says Fabian Lenz, Head of Supply System Sales at BRINER AG.