The published configuration on this page is the carbon dioxide build, with ranges of 0–20%, 0–50% and 0–100% available and further spans customisable — the pattern to follow when specifying other gases from the same platform.
Accuracy and response
Accuracy is within ±2% of full scale, repeatability within ±1% of full scale and stability within ±1% of full scale over seven days. Response is fast for an extractive analyzer: T90 within 30 seconds, so process changes and emission excursions register in near-real time.
Resolution is 0.1% or 1% depending on the configured span. Instrument life is published above five years with sensor life above three years, which frames the maintenance planning for continuous duty.
Sampling conditions
Sample flow is 1000 ±50 mL/min at a sample pressure of 0.10–0.20 MPa and a sample temperature of 0–50 °C. The analyzer works in ambients from -5 to +50 °C at up to 90% relative humidity. Mains supply is 100–240 VAC at 50/60 Hz, 1 A, with a battery standby of 8–12 hours per charge for ride-through and portable checks.
The enclosure measures 260 × 145 × 330 mm and weighs about 4 kg, with a 128 × 64 dot-matrix LCD — compact enough for analyzer shelters, CEMS racks and bench-top verification work.
What NDIR bench discipline looks like
A non-dispersive infrared bench measures by absorption: each gas absorbs at characteristic wavelengths, and the bench reads the attenuation. Its virtues for the F08's six gases are the absence of consumable chemistry and a span stability that suits continuous duty. Its disciplines are optical: keep the cell clean, keep the sample dry, and respect the warm-up. A monitoring shelter that manages sample conditioning — filtration, moisture removal, controlled flow — gets years of quiet service; one that feeds raw wet gas to the bench gets drift and corrosion instead.
Six channels in one housing also means one sample path to maintain, and maintenance effort concentrates where it pays: the conditioning train. Dryers, filters and pumps are consumables with predictable lives; stock them like consumables. The analyser itself, read over Modbus or the analogue outputs, becomes the most boring component in the shelter — which is exactly what continuous monitoring should be.
Choosing the F08's operating theatre
The published applications — biogas and landfill gas, environmental monitoring, industrial process gas, research — share a shape: a defined stream, a fixed sampling point, a need for several components at once and data that must exist every day, not on campaign days. Where a portable analyser visits, the F08 resides. The specification conversation covers the stream's full composition (including the components not being measured, because they set the conditioning design), the ranges per channel, and the data consumer: panel, logger, telemetry or control system.
Methane number and balance gas: reading the F08's biogas report
On a biogas stream the F08's six numbers arrange themselves into a story engineers learn to read at a glance: methane percentage is the product; carbon dioxide is its necessary companion, and their ratio reports the digestion's health; oxygen is the intruder whose presence accuses the gas system of leaks or the digester of air ingress — and which, rising, warns toward the flammable mixture nobody wants in a gas holder; hydrogen sulfide is the corrosion and emissions budget; carbon monoxide and the balance complete the combustion and leakage picture. Trended together, the six channels turn the analyser from a measuring device into the plant's daily medical chart, and operators who learn the chart's normal face spot its fevers early.
Shelters, sampling and the unglamorous determinants
Continuous analysers live in shelters and cabinets whose conditions decide their fate: temperature stability for the bench, sample pressure and flow inside design, condensate managed before it manages the optics, calibration gases plumbed and in date. The F08's Modbus voice should be wired into the plant's data system from day one, with the shelter's own alarms — flow fail, cabinet temperature, calibration due — treated as process alarms, because a silent analyser is worse than an absent one: it leaves a gap shaped like information. Commissioning should therefore end with a failure rehearsal: block the sample, watch the alarms, restore. A monitoring system that has never rehearsed its own failure is a hope, not a system.
Glossary for NDIR multi-gas analysis
Non-dispersive infrared — measurement by a gas's absorption at its characteristic wavelengths, without dispersing the spectrum: a filter selects the band, a detector reads the loss. Optical bench — the cell, source and detector assembly whose cleanliness is the analyser's accuracy. Reference channel — a wavelength the target gas does not absorb, against which drift and fouling are ratioed away. Span gas — the certified mixture that sets the bench's response; zero gas its baseline companion. Sample conditioning train — the filters, dryers, pumps and regulators that deliver a survivable sample to the bench. Dew point — the temperature at which the sample's moisture would condense, managed below the bench's temperature by design.
Balance gas — in biogas work, the remainder after the measured components, mostly nitrogen, whose size reports air's intrusion into the system. Cross-interference — one component's absorption shoulder leaning on another's band, corrected in the bench's mathematics when the matrix is declared. Response factor — the proportionality between concentration and signal for each channel. Shelter — the cabinet or room whose temperature stability and services the continuous analyser quietly depends on. Availability — the fraction of time the analyser produces valid data, the statistic continuous monitoring is ultimately judged by. Drift check — the scheduled challenge with known gas that proves the bench still tells the truth between calibrations.
Operating the F08 through the seasons
Continuous analysers live through the plant's year: summer heat in the shelter, winter condensation at the sample tap, the feedstock change that alters the stream's water and dust, the maintenance shutdown that leaves the bench idle and cooling. Each season has its instrument signature, and operators who learn them stop mistaking weather for failure — or failure for weather. The shelter's own services deserve a line in the operating routine: air conditioning proved, drains clear, calibration gas pressures eyeballed on the round. A bench is a long-lived asset exactly to the extent that its small environment is governed, and governance is a checklist, not a talent.
Data review completes the operating picture: weekly, the six channels' trends deserve ten minutes of a process engineer's attention, because the F08's story — ratio drift, oxygen creep, sulfide slope — is the plant's story told early. Analysers that are read become process instruments; analysers that are merely recorded become evidence after the fact, which is the more expensive way to learn the same lessons.
The F08 in the audit room
Continuous gas data eventually sits in an audit room — an emissions review, an energy investigation, a dispute about what the plant emitted or earned in a given month. The F08's defence there is the same trio as every continuous instrument's: availability statistics that show the gaps were few and explained, calibration records that tie the numbers to certified gases, and a configuration history that proves the ranges in force when the data was taken. Operators who file those three as they go find audits brief; the analyser itself, cross-examined, is a good witness precisely because its principles are stable and its records are boring. Boring, in the audit room, is the highest available praise.
- Principle
- NDIR infrared absorption
- Gases
- CO, CO2, CH4, NH3, H2S, SO2
- CO2 ranges
- 0–20% / 0–50% / 0–100% (customisable)
- Resolution
- 0.1% / 1% by span
- Accuracy
- ≤ ±2% FS
- Repeatability
- ≤ ±1% FS
- Stability
- ≤ ±1% FS / 7 d
- Response
- T90 ≤ 30 s
- Sample flow
- 1000 ±50 mL/min
- Sample pressure
- 0.10–0.20 MPa
- Sample temperature
- 0–50 °C
- Ambient
- -5 to +50 °C, ≤90% RH
- Power
- 100–240 VAC, 50/60 Hz, 1 A; battery standby 8–12 h
- Size / weight
- 260 × 145 × 330 mm; about 4 kg
- Display
- 128 × 64 dot-matrix LCD
- Service life
- Instrument more than 5 years; sensor more than 3 years
Measurement
Performance
Sampling and build
- NDIR analysis of six gases on one platform
- Accuracy within ±2% of full scale, T90 within 30 s
- Battery standby of 8–12 hours for ride-through
- Compact 4 kg enclosure for shelters and racks
Send a target gas list, get a configuration
Quotations are built from the published parameters on this site. Tell us the gases, the ranges and the quantity — or the point schedule for a fixed project — and the reply comes back within 24 hours.
Request a quotation