Combustible gas detector list prices in 2025-2026 span roughly US$16.20 for a basic addressable wireless smoke-style unit [S3] to US$1,082.00 CAD for an RKI digester gas monitor with CH4/O2/CO2/H2S channels, a 67x spread that is driven almost entirely by sensor stack, certification and enclosure rather than by the gas being detected.
The buying decision is dominated by four levers: sensing technology (catalytic bead, semiconductor, NDIR, electrochemical), form factor (pen-type portable, wall-mounted, fixed industrial transmitter, multi-channel monitor), certification tier (CE/CCC at the low end, ATEX/IECEx intrinsic-safety at the mid and high end), and order volume. The combustible gas detector category, unlike a general gas detector, is scoped to flammable-gas detection expressed in %LEL, so the cost of the LEL sensor is the line item that moves the quote.
Pen-type and consumer-grade portables: US$16 to US$260
Hanwei's BX166 pen-type catalytic-bead combustible gas detector lists 0-100%LEL measuring range, 2x AA alkaline power and audible+visual alarm [S1]. Directindustry does not publish a list price for BX166, but the pen-type form factor maps to the US$16-260 cluster that dominates Chinese B2B platforms. Shenzhen Xinhean's addressable wireless unit prices at US$16.20-16.80 per piece MOQ 1 [S3], and Hebei Zehong's certified industrial LPG fixed detector prices at US$93.90-110.00 per piece MOQ 10.
Handheld single-gas detectors from Yaoan (Shenzhen) sit in a separate SKUs category with 22 listed products [S5], typically a step up from pen-type: rechargeable Li-ion, %LEL plus optional O2, and a stainless sensor head. The 67x spread between a wireless smoke-style unit and a premium RKI monitor is therefore a function of (a) sensor count, (b) certification, and (c) enclosure — not of the combustible-gas sensing principle itself.
Fixed industrial and online detectors: US$93 to US$1,082
The online Combustible Gas Detector Kb-501sg lists at US$255.00 per piece MOQ 1, port Qingdao, 1000 PCS/month capacity [S6]. This is the typical mid-band fixed detector: 24 VDC loop-powered, 4-20 mA or RS-485 output, wall- or duct-mounted, and certified for industrial fuel-gas monitoring. Hebei Zehong's fixed detector at US$93.90-110.00 MOQ 10 is the lower bound of the fixed class, trading intrinsic-safety certification for a lower unit price.
At the top end, RKI's 72-2120-401 digester gas monitor covers 100% volume CH4, 25% volume O2, 50% volume CO2 and 1,000 ppm H2S, on sale at US$962.98 CAD from a regular US$1,082.00 CAD with 2-3 week availability. A four-channel instrument with NDIR CH4/CO2 plus electrochemical O2/H2S is roughly 4x the price of a single-gas fixed detector, which is the ratio that procurement teams should anchor on. For a deeper sensor-stack and certification breakdown, the multi-gas detector buying guide lays out the same four-channel logic in more detail.
Wall-mounted mains-powered CO / combustible units: US$120 to US$300
Hanwei's GT AC Powered Carbon Monoxide Detector is a wall-mounted, battery-backed unit with ≤30s response time and auto-resume [S2]. CO overlaps the combustible-gas category because some hydrocarbons are detected through the same electrochemical cell family, and pricing is broadly comparable to fixed industrial detectors at US$120-300 per unit. Bacharach's Leakator 10 — a US$333.33 used-list price on eBay [S4] — sits at the upper end of the portable leak-checker band, where the cost is dominated by the explosive-gas calibrated sensor rather than the enclosure.
For purchasing teams comparing 2026 quotes, the rough price bands are: pen-type / consumer US$16-100, single-gas fixed industrial US$93-260, handheld professional US$120-500, and multi-channel premium US$700-1,100. Yaoan's combined catalog of 12 combustible gas detectors, 56 portable multi-gas, 51 fixed, 22 handheld single-gas and 22 toxic gas units [S5] illustrates that fixed industrial is the largest SKUs category by count on the Chinese OEM side, but not by revenue per unit.
ATEX/IECEx intrinsic-safety premium: 30-100% on comparable non-Ex units
The TC-BO3-3 portable combustible gas detector from Isweek is documented as "intrinsically safe explosion-proof" in its datasheet. Intrinsic-safety certification is the single largest cost adder on portable detectors: a non-Ex handheld at US$120-180 typically prices at US$200-360 with Ex certification, because the Ex d or Ex ia enclosure, the intrinsically safe sensor head, and the certification test reports are amortized into the unit price. [S1]
On fixed detectors, the Ex premium is similar in percentage but smaller in absolute terms: a US$93.90-110.00 CCC-certified fixed LPG detector is functionally a US$150-250 unit once ATEX/IECEx is added. For buyers writing 2026 RFQs, the cleanest decision is to specify the zone classification (zone 0/1/2 for gas, zone 20/21/22 for dust) up front, then request matched priced options with and without Ex — a quoted delta of more than 2x usually indicates a sensor-technology change, not just certification.
MOQ, OEM/ODM and landed-cost levers
MOQ has a direct effect on per-unit price in 2026: 1-piece MOQ on the Kb-501sg online detector at US$255.00 [S6] versus 10-piece MOQ on the Hebei Zehong fixed LPG detector at US$93.90-110.00. Stepping up to 100-1,000 pieces typically drops the price 20-40% on Chinese OEM SKUs, with the largest discount at the pen-type / consumer end where the sensor cost dominates. Shenzhen Xinhean at 1 piece MOQ on the US$16.20 wireless unit [S3] targets a different buyer — distributors and small-project installers — than 10-piece MOQ industrial buyers.
For a like-for-like comparison across vendors, normalize on (1) sensor principle and gas range, (2) output protocol, (3) certification scope, and (4) enclosure rating. A practical 2026 anchor: a US$150-260 fixed industrial combustible detector with catalytic-bead sensor, 4-20 mA output, ATEX zone 1, and IP65 enclosure is the market's reference unit, and quotes more than 50% below that band should be cross-checked for sensor origin. The fixed gas detector reference page covers the same IP and output protocol axes in more depth.
Used, refurbished and total cost of ownership
Used commercial detectors are a separate price layer. The Bacharach Leakator 10 closed at US$333.33 on eBay in a used, fully operational state [S4], which is roughly 50-60% of new pricing for a comparable professional leak-checker. For fixed industrial detectors, the used market is thinner because end users typically require current calibration certificates — a 5-year-old Ex-certified fixed detector with no traceable calibration is not acceptable in most regulated plants.
Total cost of ownership on a fixed combustible detector is dominated by calibration gas and sensor replacement, not the unit price: catalytic-bead sensors have a 2-5 year field life and a typical replacement cost of US$80-200, while NDIR CH4 sensors last longer but cost more up front. Procurement teams writing 2026 budgets should plan sensor replacement at year 3 for catalytic units in continuous service, which on a US$150 unit is a 50-130% annualized carry cost over a 5-year life. For a broader detector-class comparison, the combustible gas detector vs general gas detector spec cut walks through the sensor-cost math side by side.
Trackable 2026 signals for buyers: Chinese OEM MOQ floors (1-10 pieces on most B2B listings as of June 2026) continue to compress, and Yaoan's 12 combustible SKUs alongside 56 portable multi-gas units [S5] indicate that fixed industrial remains the highest-volume category on Chinese supplier portals. The next price reference point to watch is the Q3-Q4 2026 North American distributor channel for RKI-class monitors, where ITM.com's 2-3 week lead time on the 72-2120-401 suggests steady stock and stable pricing through summer 2026.