NEW QRI2B2.B180B Siemens Infrared Flame Detector Lateral Cable 180cmstripped+Ferrule QRI2B2B180B QRI2B2 B18OB

QRI2B2B180B | Siemens Infrared Flame Detector — Lateral / Black / 180cm Cable / Gas Oil Coal Burners / LMV5 Compatible

QRI2B2 — Lateral Infrared Flame Detection for Industrial Burners

The QRI2B2B180B is Siemens' lateral-illumination infrared flame detector — part of the QRI series of burner safety sensors for gas, oil, and coal flame supervision. The "B" in QRI2B2 identifies this as the lateral (side viewing) variant: the detector's sensitive element points at 90° to the detector body axis, allowing it to view the flame from the side of the burner assembly rather than from directly in front of the flame.

The QRI2B2B180B is the complete package designation:

• QRI2B2: Lateral illumination IR detector with integrated amplifier
• .B: Cable type B configuration (black housing with stripped wire ends)
• 180: 180cm cable length
• B: Black housing

Key Specifications

Spectral Sensitivity — What QRI2B2B180B Detects

The QRI2B2B180B's photoresistor element responds to infrared radiation in the 1–3µm wavelength range, with peak sensitivity around 2µm. This spectral window covers:

Gas flames: Natural gas and LPG/propane flames emit characteristic IR radiation from hot CO₂ and H₂O combustion products in this spectral range.

Oil flames: Heavy and light fuel oil burner flames emit broadband IR including the detector's sensitive spectral range.

Coal flames: Pulverised coal burner flames generate IR radiation across the detector's operating band from both the combustion gases and incandescent particle emission.

Other IR sources: The detector also responds to any other source of infrared radiation in the 1–3µm range — important in multi-burner installations where adjacent burners must be isolated from false signals.

Applications

Industrial heating plants: Large industrial furnaces and boilers using gas, oil, or multi-fuel burners — where the QRI2B2B180B provides the flame supervision signal to the LMV5 or equivalent burner management system.

Commercial building heating: Large commercial boiler installations in factories, warehouses, hospitals, and district heating plants — where high-reliability burner flame supervision is required for safety certification compliance.

Process heating: Fired heaters in chemical, petrochemical, and refinery process units — gas and oil-fired tube heaters where continuous flame monitoring is part of the safety instrumented system.

Steam generation: Industrial steam boilers for process steam supply — gas and oil burner flame supervision integrated with the boiler management system.

Drying and curing ovens: Industrial drying ovens with direct-fired gas burners — where the QRI2B2 monitors flame presence to prevent gas accumulation in the heated chamber during burner start or flame-out events.

FAQ

Q1: What is the difference between QRI2B2B180B (lateral) and QRI2A2.B180B (frontal)?

Both are QRI2-series infrared detectors with identical electrical specifications. QRI2B2.B180B uses lateral (side, 90°) illumination — the IR-sensitive element views the flame from the side. QRI2A2.B180B uses frontal illumination — viewing directly along the detector axis. Select based on the burner's optical access geometry: use QRI2A2 where the flame zone is visible along the detector axis; use QRI2B2B180B where side-entry viewing is required.

Q2: How is QRI2B2B180B mounted on a burner?

The detector secures via a flange and clamp at the burner's lateral observation port. The flange provides the mechanical interface to the burner housing; the clamp allows angular adjustment to aim the detector's lateral view at the flame zone. The 180cm cable exits from the rear of the detector and connects to the burner control's flame signal input terminals.

Q3: Does QRI2B2B180B require external amplification?

No. The integrated flame signal amplifier inside the detector produces a DC 0...5V analogue output signal — this connects directly to the flame signal input of the LMV5 or compatible burner control. No external signal conditioning module is required between the detector and the control unit.

Q4: What IP protection does QRI2B2B180B provide against burner environment conditions?

IP54 — protection against dust ingress (dust-tight lens) and against water splash from any direction. This rating is appropriate for the typical industrial burner environment where moisture, steam, and dust are present. The impact-proof black plastic housing provides mechanical protection against the vibration and thermal environment in burner installations. Note: the detector must not be exposed to temperatures above its rated maximum — check Siemens documentation for the detector's maximum operating temperature.