Renewable Natural Gas
Waste Turned into
Green Energy
Smart sensor technologies to optimize
upgrading your biogas to biomethaneUpgrading process:Carbon Dioxide CO2Hydrogen Sulfide H2S

Biomethane CH4

Odorant

Crop Waste
ManureLandfill
Wastewater

Water H2O

Feedstock

BiogasDigestion

Gas to Grid
Power Generation,
Heating and CNG FuelingCompression & Dehydration

Biomethane

H2S scrubber
Biogas Upgrading Plant
Biogas is increasingly seen as a more renewable sourceof natural gas. Biogas is the mixture of gases producedby organic waste in the absence of oxygen. Upgradingbiogas to biomethane includes removing carbon
dioxide and water vapor along with trace gases suchas nitrogen, hydrogen sulfide, and hydrogen.

2Operators make several measurements in theseprocesses. Methane, the main component in biogas,
is flammable. Oxygen will typically be kept to lessthan 2% for safety during storage and transportation.
Oxygen is typically measured directly after thedigester. Hydrogen sulfide is scrubbed from the gas
to trace levels. Membrane filters separate the carbon
dioxide from the methane, and the concentrationof each on either side of the membrane indicatesseparation efficiency. Accurate flow metering is vital
throughout these processes, especially when there isa change in owner from producer to user. To meet tariff
limits, water vapor is measured before biomethane
entry into the gas grid. These measurements
take place in hazardous area environments.

3

Panametrics process analyzers and flow
measurement instruments have been ensuring
customer and process safety for decades.
As a recognized leader in moisture and oxygen
analyzers and liquid, steam, and gas flow meters withproven technologies, you can be sure that we provide
the best combination of technology and expertise toensure accurate process measurements. Panametrics
analyzers and flow meters are designed for complex
applications that require maximum reliability andmeasurement accuracy.

4A partnership with Panametrics brings you reliability
and consistency in measurement, and offers solutions
completely tailored to your process, supported by local
technical teams.
Our technology and application specialists are experts
in developing the best gas analysis and flow solutions
for your measurement. Along with our global network
we ensure our partners receive first-class local support
for all requirements starting from technical assessment
to commissioning and assistance.

Integrated Systems
Measurement Parameters• O2 is measured in the gas generated by thedecomposition of waste to pipe the biogas
safely: <2%• H2S scrubbed from the CH4 before entering
the networks: <10 ppm• CO2 is measured in the tail gas to monitor
separation efficiency from methane:
90% – 100%, balance CH4• CH4 of the RNG for entry into the grid:
90% – 100%, balance CO25

Process Analyzers

XMTC

XMO2

With no moving parts, the XMTC provides a robust measurement of carbon
dioxide in methane with little maintenance and unsurpassed calibration stability.
The transmitter uses the differences in thermal conductivity to report percent
level measurement.

With no moving parts and unsurpassed calibration stability, the XMO2 provides arobust oxygen measurement in biogas with little maintenance. The transmitter uses
the thermal and paramagnetic properties of oxygen to generate a ‘magnetic wind’of oxygen to enable a reliable measurement.

Thermal conductivity binary gas analyzer

Thermoparamagnetic oxygen analyzer

FEATURESFEATURES• Percent level measurement ranges up to 100• Measurement ranges up to 100% O2 in gas

percent CO2 in CH4• Percent level measurement ranges up to 100
percent CH4 in CO2• Flame-/Explosion-proof and weatherproofenclosure• Push-button calibration• Compact, rugged sensor with no moving parts• Flame-/Explosion-proof andweatherproof enclosure• Push-button calibration• Compact, rugged sensor with no moving parts• Measurement circuit compensates forvariations in background gas composition• Unique dual-chamber, temperature-controlledcell provides resistance to contamination

67Ultrasonic Flow Meters
PanaFlow Z2GUltrasonic gas flow meter for hazardous area with optional
methane content determination in biogas

The biogas that comes from the digester is typically low pressure.
It is saturated with water (6% @ 40 °C) and contains CO2 (20% - 40%).
Such an application requires powerful transducers to be able to measure
this gas mixture at very low pressure.
Biomethane is the other typical measurement here, easier to handle.
Panametrics holds a strong heritage in difficult gas flow measurement
gained from flare gas experience.

FEATURES•	Industrial designed flow cell to minimize flow
disturbances at optimal chord locations• T19 high performance transducers with highsignal to noise ratio (SNR)• Advanced diagnostics to not just measure

flow but understand meter performance andvalidate process conditions and stability• ±1% of measurement typical accuracy(two path), ± 1.5% accuracy (one path).

• Dedicated biogas algorithm to measure
CH4 concentration with ±2% accuracy.

This measurement requires an external
temperature probe input.

• Analog, Pulse, Frequency, HART, and Foundation
Fieldbus are available communication• Available for 2” to 16” (50mm to 400mm) sizes
standard (other sizes and/or special design
available upon request)• Material of construction is carbon steel,stainless steel, duplex stainless steel (othermaterials available upon request)• Flange ratings from 150# to 600# or PN10

A recognized
leader in moistureand oxygen
analyzers andliquid, steam, andgas flow meterswith proventechnologies

to PN63 (other flanges sizes available up
on request)• Shares a Panametrics heritage ofengineering design and global Baker
Hughes field service support89Moisture Analyzers

AuroraAurora TransPort

The Aurora is built upon a heritage of moisture measurement, calibration,and sample system expertise. It provides a sealed laser source with glass
window separating the laser from the process gas, superior backgroundgas compensation, and pressure and temperature compensation, living
up to its specifications as stated.

Take Aurora’s design expertise, features, benefits, and measurement fidelity
and package it for portable measurements. Panametrics proudly calls thisAurora TransPort.

Tunable Diode Laser Moisture Analyzer

Portable Tunable Diode Laser Moisture Analyzer

FEATURESFEATURES• 0 to 5000 ppm in natural gas and air• 0 to 1000 ppm in carbon dioxide•	0 to 5000 ppm in natural gas and air• Operates on battery or AC power• 0 to 1000 ppm in carbon dioxide• All filtration requirements built in• Available in AC and DC powered versions• Fast recovery from process upset conditions• Flame-/Explosion-proof and weatherproof• Light weight for portability

configuration standard• All filtration requirements built in• Fast recovery from process upset conditions

1011

HygroProII

PM880

The HygroProII combines a technologically advanced aluminum oxide moisturesensor with state-of-the-art software and electronics for unrivaled overallperformance. The HygroProII moisture transmitter is a compact, loop- poweredmoisture transmitter designed specifically to meet the demands of rugged industrial
applications. With certified intrinsically safe electronics packaged in an IP67/Type 4X
housing, the HygroProII offers unrivaled installation flexibility in these applications.

With its MISP2 moisture probe and SS880A sample system, this portable is packaged
as a kit for all spot-sampling moisture measurement needs.

Moisture transmitter for general purpose and hazardous area

Portable Aluminum Oxide Moisture Analyzer

FEATURES• Intrinsically safe
• Ambient to ppb moisture levels usingaluminum oxide moisture sensor

FEATURES• Built-in temperature and pressure sensors• Intrinsically safe

• Gas and liquid applications• Ambient to ppb moisture levels using• HART communication over the 4 – 20 mA

aluminum oxide moisture sensor

analog output• Built-in temperature and pressure sensors• Gas and liquid applications• HART communication over the 4 – 20 mA
analog output

1213

Panametrics process
analyzers and flow meters
are designed for complex
applications that require
maximum reliability andmeasurement accuracy1415

Panametrics, a Baker Hughes business,
provides solutions in the toughest
applications and environments for moisture,oxygen, liquid and gas flow measurement.
Experts in flare management, Panametrics
technology also reduces flare emissions
and optimizes performance.
With a reach that extends across the globe,
Panametrics’ critical measurement solutions

and flare emissions management areenabling customers to drive efficiency andachieve carbon reduction targets acrosscritical industries including: Oil & Gas; Energy;
Healthcare; Water and Wastewater; ChemicalProcessing; Food & Beverage and many others.
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For more information please contact yourlocal Panametrics representative, or visit:
panametrics.com© Copyright 2023. Baker Hughes Company. This material contains
one or more registered trademarks of Baker Hughes Company andits subsidiaries in one or more countries. All third-party productand company names are trademarks of their respective holders.
BHCS39441		

(07/2023)