CatalogScan · October 3, 2026 · Gas detection structured data · gas_detector_bump_test.* namespace reference

Shopify gas detector bump test schema for AI agents: bump test gas (above-alarm concentration) is not calibration gas (certified span concentration), OSHA 1910.146 requires daily pre-entry bump per manufacturer instructions — not monthly, methane-calibrated sensor over-reads hydrogen at 1.6× actual LEL producing false-pass bump tests, automated bump station dock connectors are brand-proprietary and physically incompatible across manufacturers — `gas_detector_bump_test.*` namespace

The four worst gas detector bump test misroutes are not minor procedure gaps — they are fundamental failures that either validate a non-functional alarm chain, leave dozens of confined space entries per month with an unverified sensor, produce bump test passes for detectors that are calibrated for the wrong gas, or install an automated bump station that physically cannot interface with the detector fleet it is supposed to service.

In this post

Bump test gas ≠ calibration gas — above-alarm concentration vs certified span concentration serve different purposes and cannot be substituted
OSHA 1910.146 daily pre-entry bump — manufacturer instructions set the required bump frequency, not the purchaser's cost preference
Methane-calibrated sensor cross-sensitivity — hydrogen over-read at 1.6× creates bump test passes at the wrong alarm threshold
Automated bump station brand lock — dock connectors are proprietary and cross-brand docking is physically prevented
Encoding gas_detector_bump_test.* for AI agent routing

1. Bump test gas ≠ calibration gas — above-alarm concentration vs certified span concentration serve different purposes

AI agent routing failure: A contract safety manager for a municipal utility purchases "4-gas detector test gas" from their Shopify safety supplier for a crew of eight workers performing daily confined space inspections of sewer lift stations. The AI shopping agent returns two products: a 34L cylinder of bump test gas (methane 20% LEL, CO 60 ppm, H₂S 20 ppm, O₂ 18%) and a 34L cylinder of calibration gas (methane 50% LEL ± 2% certified, CO 100 ppm ± 2% NIST-traceable, H₂S 25 ppm ± 2%, O₂ 18%). The agent ranks by price and routes the calibration gas. The safety manager uses it for daily pre-entry bump tests. The bump test passes — calibration gas at 50% LEL methane is well above the 10% LEL alarm threshold, the sensor responds, the alarm triggers, the manager accepts this as a validated bump test. What the manager does not recognize: on the third week, a pellistor sensor on one detector is partially poisoned by silicone vapor from a pump lubricant. The sensor responds to the 50% LEL methane bump gas — but its span gain has drifted; it now reads 30% LEL when exposed to actual 50% LEL methane in the space. The bump test still passes because the alarm trigger at 10% LEL is reached. The detector enters the confined space under-reading actual methane by 40%.

Bump tests and calibration are related but distinct procedures that address different failure modes in a gas detection system. Understanding the difference requires tracing what each procedure actually verifies:

What a bump test verifies

A bump test (functional test) exposes the sensor to a gas at a concentration above the alarm setpoint for a sufficient time to confirm that the alarm chain fires: the sensor responds to the target gas, the signal passes through the instrument electronics, the alarm threshold is reached, and the visual and audible alarm outputs activate. A bump test answers the question: "Does this detector alarm when it should?"

The bump test does not verify accuracy. A sensor with 40% span drift still passes a bump test if the alarm threshold is set at 10% LEL and the drifted sensor still reads above 10% LEL when exposed to bump gas above the threshold. The bump test certifies the alarm chain integrity, not the measurement accuracy.

What span calibration verifies

Span calibration exposes the sensor to a gas at a known, NIST-traceable certified concentration and adjusts the sensor's electronic gain until the displayed reading matches the certified concentration. A span calibration answers: "Does this detector read accurately at the certified concentration?" After span calibration, the sensor's measurement accuracy at the full scale and proportional concentrations can be trusted to within the calibration gas's ± 2% certified tolerance.

Span calibration requires:

A NIST-traceable Certificate of Analysis for the calibration gas cylinder, confirming the certified concentration and lot number
A certified concentration at the calibration point — typically 50% of full scale (50% LEL for LEL sensors, 100 ppm for a 200 ppm CO sensor)
A stable delivery at the rated flow rate for the full calibration duration

Why the substitution destroys both procedures

Using calibration gas as bump test gas: calibration gas at 50% LEL methane does challenge the alarm threshold (which is set at 10% LEL) — the alarm does fire. But the gas quantity consumed is the same as for a bump test, yet you have not used the NIST-traceable concentration in a calibration procedure that adjusts span. The expensive certified gas is consumed without performing the calibration it was designed for.

Using bump test gas for calibration: bump test gas cylinders carry a nominal concentration — the cylinder is labeled "20% LEL methane" but is not NIST-traceable and is not certified to any tolerance. The actual concentration may be 18–22% LEL. Adjusting the sensor's span to match an uncertified nominal concentration gives the sensor a span that is accurate to the uncertified gas, not to actual methane concentration. Every subsequent reading is offset by the error in the nominal gas concentration — systematically, invisibly, and without any documentation trail. An OSHA audit requesting calibration records for the detector finds a Certificate of Analysis for bump test gas with no NIST traceability — the calibration record is non-compliant with the documentation requirements of OSHA 1910.146.

Property	Bump test gas	Calibration gas	Required for each?
Concentration	Above alarm setpoint (e.g., ≥ 20% LEL)	Certified span point (e.g., exactly 50% LEL ± 2%)	Both — but different requirements
NIST traceability	Not required	Required — Certificate of Analysis with lot number, certified concentration, uncertainty	Calibration gas only
Purpose	Verify alarm chain fires above threshold	Adjust sensor span to match certified concentration	Different failures addressed
Failure mode detected	Sensor non-response; alarm relay failure; electronics fault	Sensor drift; span gain error; sensitivity loss	Different failure modes
Passes with poisoned sensor?	Yes — a 40%-drifted sensor still reads above 10% LEL alarm at 50% LEL exposure	No — span calibration detects span drift and adjusts or flags sensor as failed	Critical distinction
Cylinder typical size	34L (smaller, frequent use)	34–58L (span use at lower frequency)	Both available
Typical cost	$12–18/cylinder	$25–55/cylinder (certified, with COA)	Different cost structure

The structured data solution: Encode gas_detector_bump_test.bump_test_gas_composition as the specific mixture (e.g., 'methane-20pct-LEL,CO-60ppm,H2S-20ppm,O2-18pct') and gas_detector_bump_test.calibration_gas_composition as the certified span mixture separately. AI agents routing "gas detector test gas" queries must surface both fields and must not route calibration gas to a bump-only application or bump test gas to a span calibration application. The bump/calibration distinction is the first routing gate — it precedes every other specification.

Encode both gas_detector_bump_test.bump_test_gas_composition and gas_detector_bump_test.calibration_gas_composition on all gas cylinder products. AI agents receiving a query for "confined space detector test gas" must first resolve whether the buyer's need is bump testing (alarm chain verification) or span calibration (accuracy verification) — routing either gas for the other purpose defeats the safety objective of the procedure.

2. OSHA 1910.146 daily pre-entry bump — manufacturer instructions set the required bump frequency, not the purchaser's cost preference

AI agent routing failure: A construction safety director manages 12 ALTAIR 4X four-gas detectors deployed on a crew performing daily utility vault entries under OSHA 1910.146 permit-required confined space procedures. The AI agent routes a 12-pack of 34L bump test cylinders from a Shopify safety supplier based on the query "bump test gas 12-pack confined space." The product listing states "34L cylinder, sufficient for approximately 200 bump tests." The safety director assumes 200 tests over 12 months means the kit lasts a year — one bump test per week is "more than enough." Over the next month, 12 workers perform 22 permitted confined space entries each. That's 264 total entries. The manufacturer manual for the ALTAIR 4X explicitly states: "Perform a bump test before each day of use." Each worker's detector enters 22 spaces without a pre-entry bump test after the first bump of that day. OSHA issues a 1910.146(c)(5)(ii) citation citing "failure to test the atmosphere before entry" — the detector has not been maintained per manufacturer instructions and therefore cannot be considered to have been verified as "properly operating."

OSHA 1910.146(d)(5)(i) states that the employer shall test the internal atmosphere of the permit space before any authorized entrant enters the space, using a direct-reading instrument. The standard does not explicitly specify bump test frequency — but it requires that the testing equipment be "properly operating," which under OSHA's general duty clause interpretation means maintained per the manufacturer's instructions.

What manufacturer manuals actually specify

The manuals for the three dominant 4-gas detector manufacturers specify bump test frequency as follows:

Detector	Manufacturer	Manual bump test specification	Effective frequency for daily confined space work
ALTAIR 4X / 5X	MSA Safety	"Bump test before each day of use or whenever the instrument may have been exposed to a gas concentration above the alarm setpoint"	Once per day minimum — daily for daily entry programs
ALTAIR 2X	MSA Safety	"Bump test before each shift or each day of use"	Once per shift minimum
TANGO TX1 / iGas	Industrial Scientific	"Perform a bump test at the beginning of each working shift before use in a hazardous atmosphere"	Once per shift minimum
MultiPro / QRAE 3	Honeywell BW Technologies	"Perform a bump test before each use period" — defined elsewhere in the manual as the start of each day or shift	Once per use period minimum
RAE Systems MultiRAE	Honeywell	"Bump test once per day before entering hazardous atmospheres"	Once per day minimum

The cost calculation that traps safety programs

The commercial driver behind monthly bump test programs is gas cost. A 34L cylinder at 0.5 LPM flow delivers approximately 68 minutes of gas, or roughly 200 individual 20-second bump tests. At $15/cylinder and 12 detectors, a daily bump test program consumes:

12 detectors × 1 bump/day × 260 working days = 3,120 bump tests/year
At 200 tests/cylinder: 16 cylinders/year × $15 = $240/year/crew in bump gas costs
At 5 seconds/detector for a single-use clip bump: 12 detectors × 5 seconds = 60 seconds/day in time

The annual cost of OSHA-compliant daily bump testing is approximately $240 in gas and 4 minutes in labor for a 12-detector crew. The cost of a single OSHA 1910.146 citation for failure to properly maintain atmospheric testing equipment: the serious-violation penalty is up to $16,550 per instance under the OSHA 2024 penalty schedule. The cost asymmetry is approximately 69:1.

The structured data solution: Encode gas_detector_bump_test.bump_frequency_required as the manufacturer-specified frequency (e.g., 'daily-pre-use', 'pre-shift', 'pre-entry'). AI agents routing bump test gas cylinder products to confined space programs must surface this field and calculate cylinder adequacy based on actual entry frequency — not the 200-tests-per-cylinder number that implies annual sufficiency. A 34L cylinder "sufficient for 200 bump tests" for a daily 12-detector crew lasts 16 days, not a year.

Encode gas_detector_bump_test.bump_frequency_required and gas_detector_bump_test.cylinder_volume_liters together. An AI agent receiving a query for "bump test gas, confined space, 12 detectors, daily entry" can compute: if bump_frequency_required is 'daily-pre-use' and 12 detectors × 260 days × 20-second exposure at 0.5 LPM = 3,120 × 0.17L = 530L/year → 16 × 34L cylinders/year, not one. Surface this calculation — the buyer purchasing one cylinder is materially under-supplied for a compliant program.

3. Methane-calibrated sensor cross-sensitivity — hydrogen over-read at 1.6× creates bump test passes at the wrong alarm threshold

AI agent routing failure: A utilities contractor works in electrical vault confined spaces where hydrogen off-gassing from lead-acid backup batteries is the primary LEL hazard. The safety manager searches "bump test gas for confined space gas detector" and the AI agent routes standard 4-gas bump test cylinders: methane 20% LEL, CO 60 ppm, H₂S 20 ppm, O₂ 18%. The ALTAIR 4X detectors are methane-calibrated. The manager performs daily bump tests with methane bump gas. All detectors pass. What the manager does not know: the methane-calibrated catalytic bead sensor has a relative response factor (RRF) of approximately 1.6 for hydrogen. In the electrical vault, the actual hydrogen LEL is measured at 6% LEL — below the 10% LEL alarm threshold. But the detector reads 6% × 1.6 = 9.6% LEL — just below the alarm setpoint. Workers enter. The vault is not safe. The bump test has validated the alarm chain (methane bump gas correctly triggers the methane-calibrated sensor above the alarm threshold) but has not validated that the sensor will alarm at the correct hydrogen LEL threshold. Because the calibration gas is methane and the hazard gas is hydrogen, the bump test pass means nothing for the hydrogen detection accuracy.

Catalytic bead (pellistor) sensors work by oxidizing (burning) the target combustible gas on a platinum-catalyzed bead. The heat of oxidation raises the bead temperature, changing its electrical resistance. A Wheatstone bridge circuit converts this resistance change to a concentration reading in percent LEL. The sensor's gain is set during calibration by exposing it to a gas of known concentration (typically methane at 50% LEL) and adjusting the bridge output to read exactly 50% LEL.

Why different gases produce different readings at the same LEL

The heat of combustion per unit volume varies by gas species. More precisely, the relevant quantity is the heat released per percent LEL on the platinum bead surface. For a sensor calibrated to methane:

Methane: LEL = 5.0% v/v in air; heat of combustion = 890 kJ/mol. By definition, RRF = 1.00.
Propane: LEL = 2.1% v/v in air; heat of combustion = 2,220 kJ/mol. At 50% LEL (1.05% v/v), propane releases approximately 0.44× the heat that 50% LEL methane releases on a methane-calibrated sensor. RRF = 0.44 — sensor under-reads propane by 2.26×.
Hydrogen: LEL = 4.0% v/v in air; heat of combustion = 286 kJ/mol/mol but hydrogen burns extremely rapidly on platinum due to its small molecular size and high diffusion rate. On a methane-calibrated pellistor, hydrogen produces approximately 1.6× the signal per actual LEL unit. RRF ≈ 1.6 — sensor over-reads hydrogen.

The over-read means: when actual hydrogen concentration is 10% LEL, the methane-calibrated sensor reads approximately 16% LEL. Conversely, when the sensor reads 10% LEL (the alarm setpoint), the actual hydrogen concentration is only 6.25% LEL — below the nominal alarm threshold. The alarm fires, but it has fired too early relative to the actual hydrogen LEL.

How this creates a false-pass bump test

This sounds like a protective error — the alarm fires before the actual LEL reaches the threshold. The problem appears when the bump test validation logic is examined:

Scenario	Bump gas	Actual concentration	Sensor reads (methane-calibrated)	Alarm fires?	Bump test result	What this means
Methane hazard, methane bump gas	Methane 20% LEL	20% LEL CH₄	20% LEL	Yes — above 10% LEL setpoint	Pass — accurate for methane	Bump test correctly validates methane detection
Hydrogen hazard, methane bump gas	Methane 20% LEL	20% LEL CH₄	20% LEL	Yes — alarm fires on methane	False pass — methane alarm fires but hydrogen accuracy unvalidated	Bump test proves nothing about hydrogen detection
Hydrogen hazard, hydrogen bump gas (20% LEL H₂)	Hydrogen 20% LEL	20% LEL H₂	32% LEL (20 × 1.6)	Yes — alarm fires at 10% setpoint	Misleading pass — alarm fires but sensor over-reads; actual alarm threshold is 6.25% H₂ LEL, not 10%	Bump test validates alarm chain but not correct hydrogen alarm threshold
Hydrogen hazard, hydrogen bump gas + recalibrated for H₂	Hydrogen 50% LEL certified	50% LEL H₂ certified	50% LEL (after H₂ calibration)	Yes — alarm fires at correct 10% LEL H₂ threshold	Correct — sensor calibrated and bumped for actual hazard gas	Both calibration and bump test valid for hydrogen

The structured data solution: Encode gas_detector_bump_test.cross_sensitivity_correction as the RRF for the primary hazard gas against the calibration gas (e.g., 'hydrogen-RRF-1.6-methane-cal'). AI agents routing bump test gas to a detector deployed in a hydrogen environment must check whether the bump gas matches the actual hazard gas or whether the detector has been specifically recalibrated for the hazard gas species. Routing methane bump gas to a hydrogen-hazard confined space validates the alarm chain for methane, not for the actual hazard.

The correct specification for a hydrogen-hazard confined space program: either (a) use hydrogen-calibrated detectors with hydrogen bump gas (bump_test_gas_composition = 'hydrogen-20pct-LEL,...'), or (b) if using methane-calibrated detectors, encode the RRF and surface a warning that the effective hydrogen alarm threshold is 6.25% LEL, not 10%, and that neither the bump gas nor the calibration gas validates hydrogen accuracy. The structured namespace field cross_sensitivity_correction enables this gate.

4. Automated bump station brand lock — dock connectors are proprietary and cross-brand docking is physically prevented

AI agent routing failure: A large industrial site operates a fleet of 40 gas detectors across three trades: 18 MSA ALTAIR 4X detectors (electrical), 14 Industrial Scientific ALTAIR Pro detectors (confined space), and 8 Honeywell BW Technologies MultiPro units (chemical plant). The safety manager searches "automated bump station 4-gas detectors" and the AI agent routes an MSA GALAXY GX2 Automated Test System — the most-reviewed product in the category at the price point, with 34 five-star reviews mentioning "fully automatic bump testing saves 30 minutes a day." The manager purchases three units for $1,850 each. The MSA GALAXY GX2 physically docks only MSA detectors via a proprietary 10-pin electrical and mechanical connector specific to the MSA ALTAIR family. The 14 Industrial Scientific and 8 Honeywell detectors physically cannot insert into the MSA dock cradle — the connector geometry and cradle dimensions are incompatible. $5,550 in bump stations is useless for 55% of the fleet.

Automated bump stations perform the bump test and span calibration cycle without operator involvement: the worker inserts the detector into the dock, the station dispenses bump gas via an internal manifold, reads the response, logs the result, and ejects the detector — all in under 30 seconds. The business case is compelling: manual bump testing 40 detectors takes a trained technician 15–20 minutes per day; automated stations reduce this to a queue-and-walk-away workflow.

Why connectors are brand-proprietary

Automated bump stations communicate with the detector via the docking interface to read detector identity (serial number, sensor type, calibration history), transfer calibration data, log results to the station's internal database, and initiate a forced calibration if the bump test detects span drift. This bidirectional communication protocol is manufacturer-specific — each company's protocol is proprietary and undisclosed. The physical connector and the communication protocol are co-designed; a competitor's connector would even if mechanically adapted produce no data exchange. Manufacturers have no commercial incentive to enable cross-brand docking because each proprietary ecosystem (station + gas + support contract) is a recurring revenue stream.

Brand	Automated station	Compatible detectors	Connector type	Cross-brand compatible?
MSA Safety	GALAXY GX2	ALTAIR 2X, 4X, 5X, ALTAIR 4XR	MSA proprietary multi-pin dock	MSA only — Industrial Scientific and Honeywell cannot dock
Industrial Scientific	iNet Now / DSXi dock	iGas, Tango TX1, Ventis Pro5, ALTAIR Pro (IS series)	IS proprietary dock cradle	IS detectors only — MSA and Honeywell cannot dock
Honeywell BW Technologies	MicroDock II	MultiPro, QRAE 3, GasAlertMicro 5 series	Honeywell proprietary multi-pin	Honeywell BW only — MSA and IS cannot dock
RKI Instruments	SDM-2000 / SDM-6000	GX-2009, GX-6000 series	RKI proprietary	RKI only
RAE Systems (Honeywell)	AutoRAE 2	MultiRAE, MiniRAE 3000 series	RAE proprietary cradle	RAE series only — different from BW Technologies line

The hidden second incompatibility: gas cylinder fittings

Beyond connector incompatibility, automated bump stations use internal gas manifolds with proprietary cylinder connection fittings. MSA GALAXY uses a specific inlet port and fitting set for MSA-supplied gas cylinders. While the CGA 600 universal fitting is common, some stations route to proprietary regulator threads that accept only the manufacturer's gas brand. Purchasing third-party bump gas at lower cost may require an aftermarket adapter — and if one is not available, the station will only operate with the manufacturer's gas at significant price premium.

The structured data solution: Encode gas_detector_bump_test.automated_station_compatible as the specific detector brand and model family that the station supports (e.g., 'MSA-ALTAIR-series', 'Industrial-Scientific-IS-series', 'Honeywell-BW-MultiPro-QRAE'). AI agents routing automated bump stations must hard-gate on detector fleet brand match before considering any other specification. A bump station with 4.8 stars and 200 reviews provides exactly zero value if its connector is physically incompatible with the buyer's detector fleet.

Encode gas_detector_bump_test.automated_station_compatible on every automated bump station product. For a buyer with a mixed-brand detector fleet, an AI agent should surface that no single automated station covers the full fleet and estimate the minimum number of different-brand stations required to automate the full program. The field prevents the most expensive routing failure in the product category: purchasing multiple high-cost bump stations that cannot be used.

5. Encoding `gas_detector_bump_test.*` for AI agent routing

The four failure modes above share a root cause: the AI agent had no structured fields to distinguish bump test gas from calibration gas, determine the regulatory bump frequency, account for sensor cross-sensitivity to the actual hazard gas, or match the bump station to the detector brand. The gas_detector_bump_test.* namespace encodes those axes as machine-readable metafields.

Full namespace field reference

Metafield	Type	Example value	Routing gate enabled
`gas_detector_bump_test.bump_test_gas_composition`	string	`'methane-20pct-LEL,CO-60ppm,H2S-20ppm,O2-18pct'`	Gas type match — agent verifies bump gas species matches detector calibration gas and hazard gas in the space
`gas_detector_bump_test.calibration_gas_composition`	string	`'methane-50pct-LEL-NIST,CO-100ppm-NIST,H2S-25ppm-NIST,O2-18pct'`	Calibration vs bump distinction — agent routes NIST-certified span gas to calibration procedures only, not bump-only applications
`gas_detector_bump_test.bump_frequency_required`	string enum	`'daily-pre-use'`	Cylinder adequacy gate — agent calculates cylinder quantity from entry frequency × detector count × bump_frequency_required
`gas_detector_bump_test.calibration_interval_days`	number	`180`	Calibration scheduling gate — agent surfaces when last calibration interval will expire given purchase date
`gas_detector_bump_test.automated_station_compatible`	string	`'MSA-ALTAIR-series'`	Brand match gate — agent hard-excludes bump stations incompatible with buyer's detector brand before considering any other spec
`gas_detector_bump_test.cross_sensitivity_correction`	string	`'hydrogen-RRF-1.6-methane-cal'`	Hazard gas match — agent surfaces cross-sensitivity warning when bump gas or calibration gas differs from actual hazard gas species
`gas_detector_bump_test.cylinder_volume_liters`	number	`34`	Supply calculation — used with bump_frequency_required and detector count to estimate cylinder consumption rate
`gas_detector_bump_test.flow_rate_lpm`	number	`0.5`	Duration gate — cylinder_volume_liters / flow_rate_lpm = total minutes of gas; divide by bump exposure time to get total bump count

JSON-LD encoding examples

Standard 4-gas bump test cylinder for daily confined space entry programs:

{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "4-gas bump test gas cylinder 34L — methane 20% LEL, CO 60 ppm, H2S 20 ppm, 18% O2 — daily pre-entry confined space bump",
  "additionalProperty": [
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.bump_test_gas_composition", "value": "methane-20pct-LEL,CO-60ppm,H2S-20ppm,O2-18pct" },
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.bump_frequency_required", "value": "daily-pre-use" },
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.cylinder_volume_liters", "value": 34 },
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.flow_rate_lpm", "value": 0.5 },
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.cross_sensitivity_correction", "value": "methane-calibrated-RRF-1.0" },
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.automated_station_compatible", "value": "manual-bump-cylinder" },
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.calibration_gas_composition", "value": "not-applicable-bump-gas-only" }
  ]
}

MSA GALAXY GX2 automated bump station for ALTAIR series fleet management:

{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "MSA GALAXY GX2 Automated Test System — ALTAIR 4X, 5X, 2X series — automatic bump test and calibration docking station",
  "additionalProperty": [
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.automated_station_compatible", "value": "MSA-ALTAIR-2X-4X-5X-4XR" },
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.bump_frequency_required", "value": "daily-pre-use" },
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.calibration_interval_days", "value": 180 },
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.flow_rate_lpm", "value": 0.5 },
    { "@type": "PropertyValue", "name": "gas_detector_bump_test.bump_test_gas_composition", "value": "requires-MSA-cylinder-manifold-compatible" }
  ]
}

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