RGQ 5 / RGQ 3 — correlative gas quality analyzers (calorific value, Wobbe index, H2, CO2)
RGQ 5 and RGQ 3 are correlative gas quality analyzers that measure the parameters of combustible gases without chromatographic separation. They output calorific value, Wobbe index, density, methane number and CO2 and H2 fractions every second. RGQ 5 is stationary and RGQ 3 is portable.
- Principle
- correlative method: patented gas viscometer + MEMS thermal conductivity and CO2 sensors
- Measured values
- Hs, Hi, Ws, Wi, density, factor Z, stoichiometric air/fuel ratio, methane number, H2 and CO2 (mol. %)
- Error
- ≤ 1 % of the measured value (RGQ 527 OIML — < 0.5 %)
- Response
- viscosity — every 4.5 s; thermal conductivity and CO2 — every second
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
RGQ 5 and RGQ 3 are correlative gas quality analyzers that measure parameters of combustible gases that matter for process control. The method is based on correlation, and a patented gas viscometer, paired with microelectromechanical (MEMS) thermal conductivity and CO2 sensors, calculates the energy characteristics of the gas without chromatographic separation. Every second the analyzer outputs the gross and net calorific value (Hs, Hi), the upper and lower Wobbe index, density, the compressibility factor Z, the stoichiometric air/fuel ratio, the methane number and the volume fractions of CO2 and H2. The device has no moving parts or chemical reactions, and no carrier gas is needed. Viscosity data is updated every 4.5 s, thermal conductivity and CO2 every second. The error does not exceed 1 % of the measured value.
RGQ 5 is a stationary analyzer for continuous measurement, intended for biomethane injection points, monitoring of hydrogen blending, combustion control and gas network monitoring. The short response time and low required inlet pressure make it suitable for a range of tasks. Gas is supplied at a flow of 30 ml/min through a 1/4″ NPT connection, the outputs are analog 4–20 mA and Modbus RTU, and the supply is 24 V DC. The sensor units come in five variants: RGQ 511 Extended (viscosity and thermal conductivity), RGQ 522 Renewable (with CO2), RGQ 513 Hydrogen (with H2 determination), RGQ 524 Ultragreen (CO2 and H2, on request) and RGQ 527 OIML with an error below 0.5 %.
The basic version consists of the measuring unit only. The extended one is mounted on a wall plate with an inlet filter, a pressure reducer and an adjustable bypass, and optionally it is placed in a plastic enclosure with an inspection window and heating. The plate is compatible with the EMC500 frame, so existing wiring can be kept. The enclosure is certified for gas group IIC, that is, for hydrogen as well; CE, ATEX and IECEx (optional) certificates are available.
RGQ 3 is a portable version for commissioning, maintenance and emission reduction work, which can also be used for permanent measurements. The compact rugged case has quick-connect shut-off couplings, a built-in pressure regulator up to 10 bar, a purge line and a flow limiter. Without external power the analyzer runs for up to 24 hours. Data is transmitted over Bluetooth to the manufacturer's app and the cloud, with export to Excel and CSV.
Technical specifications
| Principle | correlative method: patented gas viscometer + MEMS thermal conductivity and CO2 sensors |
|---|---|
| Measured values | Hs, Hi, Ws, Wi, density, factor Z, stoichiometric air/fuel ratio, methane number, H2 and CO2 (mol. %) |
| Error | ≤ 1 % of the measured value (RGQ 527 OIML — < 0.5 %) |
| Response | viscosity — every 4.5 s; thermal conductivity and CO2 — every second |
| RGQ 5 variants | RGQ 511 Extended, RGQ 522 Renewable (CO2), RGQ 513 Hydrogen (H2), RGQ 524 Ultragreen, RGQ 527 OIML |
| Sample flow | 30 ml/min; 1/4″ NPT connection |
| Outputs | 4–20 mA, Modbus RTU |
| Power supply | RGQ 5 — 24 V DC; RGQ 3 — battery up to 24 h, USB |
| RGQ 3 | portable; inlet pressure up to 10 bar (built-in regulator); Bluetooth, manufacturer's app, cloud |
| Explosion protection | enclosure for group IIC (including hydrogen); ATEX/IECEx optional |
| Carrier gas | not required |
Request a price and lead time
RGQ 5 / RGQ 3 — correlative gas quality analyzers (calorific value, Wobbe index, H2, CO2). We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
Which values does the analyzer output and how often?
Calorific value Hs and Hi, Wobbe index, density, factor Z, methane number, stoichiometric ratio and CO2 and H2 fractions. Viscosity data is updated every 4.5 s, thermal conductivity and CO2 every second.
What is the measurement error of RGQ 5?
The error is no more than 1 % of the measured value. The RGQ 527 OIML variant has an error below 0.5 %.
How does RGQ 3 differ from RGQ 5?
RGQ 3 is portable, has a built-in pressure regulator up to 10 bar and runs for up to 24 hours without external power. RGQ 5 is stationary, is powered by 24 V DC and has 4–20 mA and Modbus RTU outputs.
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