Calibration test bench for gas meters Calibration of domestic gas meters (G1,6…G400) The test bench is especially designed for the calibration of domestic gas meters (diaphragm gas meters, ultrasonic gas meters, thermoelectric gas meters). The test bench has a modular design – it is possible to combine 1×6 to 4×6 clamping points for gas meters. The modular design allows 1 to 12 as meters to be tested simultaneously. In parallel, up to twelve test items can be adapted, run in and leak tested. The leak tests are carried out automatically. The gas meters are tested at three or more measuring points. A magazine made of three sonic nozzles is used as a flow sensor. The nozzle magazine can be exchanged with just a few hand movements so that up to five different as meter types can be calibrated on one test bench. Optionally, a nozzle drum with nine combinable nozzles can be used. This allows the generation of up to 512 different flow points. This means that all five gas meter types G1.6…G10 can be tested without nozzle change. Tests are carried out in accordance with the PTB Testing Instructions Volume 25 and 29 and in accordance with DIN EN 1359. Options Push loading drawers with 3 sonic nozzles for G1.6…G10 SMF® Barrel system with 9 sonic nozzles for five types of gas meters (G1.6…G10) Enhancements subsequently possible Storage of test results on SQL-Server Mobiles peripheral for flexible input of device data Semidual use – Parallel pre-run and measuring Features High long-term stability through the use of sonic nozzles Highest accuracy by the use of sonic nozzles Optimum capacity utilization – short process times Integrated plausibility check of the meter signal Automated counter monitoring Fast and stable adjusting of the volume flow Modular system for 1 to 24 units Long-term stable measuring elements – low recalibration effort...

Critical / Sonic nozzles Flow measurement elements with highest accuracy EP Ehrler Prüftechnik manufactures sonic nozzles in the flow range from 0.005 up to 2000 m³/h. In addition to the standard range, EP Ehrler Prüftechnik offers customerspecific nozzles which are perfectly designed for your application in accordance to DIN EN ISO 9300*. Nozzle holders including sensor connections are available for all nozzle sizes for installation in customer applications Several nozzles can be combined to set several volume flows, allowing a high number of different flow rates to be generated rapidly. It is possible to generate e.g. 2^8 = 256 different flow rates using 8 critical nozzles. Binary staggering of the nozzles ensures a uniform coverage of the volume flow range. * For flow rates less than 0.1 m³/h only based on DIN EN ISO 9300. Application examples Calibration of flow meters, e.g. gas meters, LFE, Venturi nozzles, MFM, MFC Periodic calibration tasks, e.g. calibration device for production parts (valves, actuators, air mass meters, etc.) Flow reference without further measurement technology Sortiment Single nozzles in the flow range from 0.005 to 2000 m³/h Suitable nozzle holders with sensor connections Nozzle wheel system for combining different nozzles SMF® – SonicMasterFlow® nozzle test bench...

Flow generator Simulating breathing air flows for the calibration of flow sensors (air) The test bench is used to calibrate air flow sensors for lung function diagnostics and is designed for simulating the human breathing air. By using a piston system, constant flows and flow profiles such as sine, trapezoid or freely selectable curves can be generated via data point input (flow generator). Flow measurement in medical industry The test system is particularly characterized by the generation of stable flows in the low flow volume range. In the medical industry it is used to adjust or calibrate flow sensors, for example to measure human respiration. The human breathing velocity is very fast – the use of the piston system makes it possible to generate high flow rates and to regulate and, if necessary, adjust them at the same time. Features High dynamic Freely selectable volume flow curves Traceable calibration of the volume flow...

GA21 plus Portable gas analyser GA21 plus is a portable analyser using advanced technologies. It can be equipped with up to 8 electrochemical and NDIR sensors. The analyser has a built-in pressure sensor, large internal memory for results and built-in ribbon printer for standard (non-thermal) paper. Optional condensation “miniDryer” completes the offer for our best-selling portable device. plus GA21 as the measurement instrument meets the requirements of EN 50379 and EN 50270. Features  - Differential pressure sensor – for measurements of chimney draft and flow velocity (with help of Pitot tube)  - Soot measurement program  - Measurements of gas and ambient temperatures Built-in large memory for results, two formats of data savings  - Calculations of many additional parameters...

GasPro – Mobile gas sampler Representative cyclical gas sampling to determine gas quality in the gas network. Analysing the gas quality in the gas network is essential to monitor technical specifications and ensure correct billing. The GasPro is a mobile gas sampler, with which cyclic sampling can be carried out easily and flexibly at any point from dry gas networks. The samples are collected in a sample cylinder in the GasPro and can then be analysed in a laboratory. The GasPro allows the separation of sampling and sample analysis and is therefore more cost effective and flexible than for example fixed installed gas chromatographs. Applications Natural gas quality Assessment of natural gas quality with respect to corresponding regulations (e.g. DVGW) e.g. at network interconnection points and in supply areas with feed-in involving differing gas qualities. SmartSim-validation Validation of gas quality tracking systems (SmartSim) – comparison of simulated gas parameters with actual analysis values via GasPro samples. Biogas quality Determination of gas parameters at biogas plants. Hydrogen quality Determination of hydrogen purity. Process gas quality Determination of different process gas qualities (available process gases on request). Official calibration regulation of gas characteristics, PTB approval GasPro is approved by PTB (Physikalisch Technische Bundesanstalt, Germany) for use in gas parameter custody transfer assessment, e.g. for validation of gas quality tracking systems. Due to the optimized gas sampling process with the GasPro the error limit of calorific value is HS = 0.112 kWh/m³ (including analysis)....

HPPP480 Calibration system for gas meters with natural gas The calibration system serves as a standard for the calibration of gas meters of natural gas. The supply of natural gas occurs directly from a pipeline. The gas used for calibration is then fed back into the pipeline. The system consists of the piston prover as a primary standard. Sonic nozzles for flow stabilization and as secondary standard. Turbine meters as reference standards. The Piston prover is traceable to the sizes both in terms of length and time. The system is optionally equipped with a calibration device for the diameter and length of the measuring tube. Options Nozzle register with calibration as a secondary standard Calibration set-up for diameter Calibration set-up for length Gas temperature control Features High-precision calibration standard: Uncertainty up to ≤ 0.07% (k=2) Variable calibration pressure up to 100 bar Traceability to the SI units in length and time...

Laminar Flow Elements Flow measurement elements with highest accuracy EP Ehrler Prüftechnik manufactures LFEs in the flow range from 0.012 to 4000 m³/h. In addition to the standard range, EP offers customer-specific LFEs that are perfectly designed for your application. Suitable inlet and outlet sections and the associated mounting accessories are available for all sizes for installation in customer applications. The achievable measurement accuracy depends significantly on the sensor technology used, in particular on the differential pressure sensor. When using high-quality sensors, measurement accuracies* of up to 0.5 % MV can be achieved with LFEs in the measuring range of 1:10. In order to cover a very wide measurement range without restrictions in measurement accuracy, LFEs with overlapping flow ranges can be combined in one measurement setup. Alternatively, LFEs with correspondingly lower measurement accuracy can also be calibrated for an extended measurement range up to a maximum of 1:100. *Higher measurement accuracies on request Application examples Calibration of flow meters, e.g. gas meters, LFE, Venturi nozzles, MFM, MFC Determination of characteristic curves for valves, fans, filters, etc. Flow measurement, e.g. for intake air measurement on engine test benches or in sample test benches for tank venting valves Production monitoring of components...

LMF® – LaminarMasterFlow® High-precision flow measurement of gas and air The EP LMF® – LaminarMasterFlow® is a complete system for high precision flow measurement of gas and air (volume and mass flow). The LMF® system consists of a flow processor, a Laminar Flow Element (LFE) as measuring section, a cable set and a sensor set. Different types of flow processors, diverse measurement accuracies, a big range of Laminar Flow Elements in different sizes and some options can be selected application specific and allow a variable system configuration. Applications Calibration of gas meter, Mass Flow Meter (MFM), LFEs, Venturi Nozzles Characteristic curve determination for valves Characteristic curve measurement for filters Characteristic curve measurement for fans & ventilators...

ReciFlow™ Gas flow meter Calibration standard for low flows Our ReciFlow™ is an extremely accurate flow meter for gases. The measurement principle is based on a proven technique of a flow-through piston. The gas flow meter is characterized by high measurement accuracy and reliability Features Continuous measurement Faster and more reliable calibrations Flexible adjustment of the flow volume Easy to use intuitive touch panel user interface Large pressure range that is not limited to ambient pressure...

RPD Gas meter box Mobile calibration system for flow meters Hydrogen approved The gas meter measurement box convinces with its mobility due to the smart hard case in which our measurement unit is installed. In the test setup, this is connected between the gas meter to be tested and the consumer. The compact calibration equipment is ideally suited for on-site calibrations. Only mains voltage is required for the device to function. After the test item has been properly connected, the measurement software is started on the mobile end device such as a tablet or mobile phone and a connection is established. Now different flow points can be measured and saved. At the push of a button, a protocol in pdf-format is created and saved on the mobile end device. This can then be sent via the available services. For the connection of test items or also for media supply with air, various accessory components can be ordered in a separate case. Features Calibration of flow meters directly on-site Mobile measuring box for data acquisition: Measurement data display via Android app Use of a rotary piston gas meter for a reliable and precise reference measurement...

RPD Reference gas meters The gold standard for low flow measurement The rotary piston gas meters GM16 meet the highest demands on the reliable and precise reference measurement of low flow up to 0.01 m³/h. You achieve an excellent measuring accuracy of 0.5% MW + 0.005% EW. Both variants – with 1 or 2 HF pulse generators – are suitable for operation up to 6 bar overpressure. The new generation of reference gas meters is not only suitable for air, but also for hydrogen, natural gas and other non-flammable and non-aggressive gases. With the continuous, absolutely pulsation-free and highly precise flow measurement, the reference gas meters from Ehrler Prüftechnik are the gold standard in the field of low flow measurement – also for hydrogen. Measuring principle The reference gas meters GM16 operate according to the direct displacement principle (RPD -rotary positive displacement), in which two counter-rotating pistons convey a fixed volume from the inlet to the outlet of the gas meter with each full revolution. Due to the specially shaped pistons, an absolutely pulsation-free continuous operation can be realized (patent pending). Applications Industrial applications Calibration & transfer standards Measurement sections for test benches Flow measurement of hydrogen...

SMF® – SonicMasterFlow® Highly precise flow measurement of gases and air The SMF® – SonicMasterFlow® series are calibration systems for high-precision flow measurement of air and other gases (optional) (volume and mass flows) using critically operated laval nozzles. The modular design for a wide range of flow ranges with clever options makes the nozzle test benches ideal for a wide variety of applications. Operation is simple and safe thanks to an intuitive user interface, the automatic nozzle combination and internal system checks. SMF® – SonicMasterFlow® systems are complete nozzle test benches that work with automatically controlled nozzle systems in drum design. The modular structure allows you to choose the optimal combination for your own application from different drum sizes and different nozzle sets. The application spectrum ranges from the lowest flows from 0.0025 up to 10,000 m³/h. Applications: Calibration of various flow sensors (gas meters, air mass meters, MID, LFEs, orifices, venturis, ultrasonic gas meters etc.) Calibration as an end-of-line or development test at the manufacturer Alignment level for valves, actuators, flow meters, etc...