Elster

Elster is a gas metering and combustion control brand founded on 1 October 1848 in Berlin, where it began by making gas lamps. It built a factory in Mainz in 1876 and later merged with the Dutch flow specialist Instromet in 2005. Melrose bought the Elster group in 2012, and Honeywell acquired it in 2015–2016, so Elster products are now sold by Honeywell.

Seven Star LLC sources and supplies Elster ultrasonic flow meters, gas flow computers and station communication units for pipeline and utility operators in Oman.

Elster company profile
Founded1 October 1848, Berlin, GermanyHeadquartersMainz-Kastel, Germany (historic group base)OwnershipHoneywell, since the end of 2015 / January 2016Related brandsInstromet, Kromschröder and American Meter, all part of the former Elster groupProduct familiesTurbine, rotary and ultrasonic gas meters, volume correctors and flow computers, gas pressure regulators and safety shut-off valves, Kromschröder burner controls and valves

Milestones
1848: Elster is founded in Berlin and starts producing gas lamps.1876: The factory in Mainz is built.2005: Elster and Instromet merge.2012: Melrose acquires the Elster group.2016: Honeywell completes its purchase of Elster from Melrose.

Elster product families listed here

The Elster flow meter on this page is the Q.Sonic plus, a multipath ultrasonic gas meter for custody transfer measurement, listed together with a USM display unit. Flow computers come from two device series. The enCore series is represented by the enCore FC1 and the enCore ZM1. The gas-net series is represented by the gas-net F1 flow computer and the gas-net D2, a data forwarding unit for the DSfG station interface used in German-standard gas metering systems.

Where Elster gas metering equipment is used

Elster gas meters and flow computers work at transmission and distribution metering stations, city gate and pressure reduction stations, power plant and industrial fuel gas inlets, and gas storage sites. The flow computer converts measured volume to base conditions using pressure, temperature and gas quality data, records the fiscal archives and passes data to the SCADA system.

Elster products we list
FamilyExamplesFlowmetersIRM-3 DUO Rotary Gas Meter DN100 to DN200, Q.Sonic plus Ultrasonic Gas Flow Meter, Quantometer Q/Q75 Turbine Gas Meter DN50…, RABO Rotary Gas Meter DN32 to DN150, TRZ2 Turbine Gas Meter DN50 to DN150, Honeywell Elster USM QP Ultrasonic Flow…Flow ComputersEK280 Gas Volume Conversion Device, enCore FC1 Flow Computer, gas-net F1 Flow Computer for Gas Measure…, Elster® enCore ZM1 Flow ComputersIndustrial CommunicationsGas-Net D2 DSfG-DFU Data Forwarding UnitGas Analyzer SystemsGasLab Q2 Real-Time Natural Gas Quality…

Ordering Elster meters and flow computers: what we need

For an ultrasonic meter: nominal size, pressure rating and flange standard, flow range, gas composition, operating pressure and temperature, the metrological approval required and the flow calibration expected. For a flow computer: device type, the serial number and software version of the existing unit, the I/O boards fitted, the meters and transmitters connected, the conversion and compressibility method (for example AGA 8) and the communication protocols. A photo of the type plate and the parameter printout shorten the check against the manufacturer’s documentation considerably.

Facts checked against Elster's own milestone timeline and the Honeywell acquisition announcements, October 2026.

Browse Elster products by category: Flow Computers, Flowmeters, Industrial Communications.