Description
The Chentronics DSF-2010-SB (also designated under part number 2653-271-11) is an integrated, microprocessor-based digital flame scanner designed for non-hazardous industrial areas. It combines solid-state ultraviolet (UV) and infrared (IR) sensors inside a single housing, serving as a dual-spectrum combustion verification tool for industrial burners, utility boilers, and process heaters. By processing both UV spectral peaks (350 nm) and IR spectral peaks (700 nm) simultaneously, the unit provides accurate flame discrimination and fail-safe monitoring without requiring a separate external signal processor evaluation card.
Technical Specifications
| Parameter | Value / Specification |
| Brand / Manufacturer | Chentronics (A Coen Company) |
| Model / Part Number | DSF-2010-SB (MPN: 2653-271-11) |
| Product Series | iScan2 Series |
| Detection Method | Combined Solid-State UV (Peak 350 nm) & IR (Peak 700 nm) |
| Area Classification | Non-Hazardous Areas |
| Input Power Supply | 24 V DC (\pm 4 V) |
| Current / Power Draw | 140 mA, 3.36 VA nominal |
| Primary Analog Output | 4–20 mA flame signal loop |
| Secondary Analog Output | 4–20 mA configurable (Map / Auto-Gain / Raw data) |
| Relay Configurations | 2 x Configurable Dry Contact Relays (Flame and Fault status) |
| Local Diagnostics | Integrated EASI alignment/sighting indicator |
| Housing Rating | NEMA 4X / IP66 cast enclosure |
| Mechanical Mount Interface | 1-inch NPT Female sight pipe connection |
| Operating Temperature | −30 to +70 °C (−22 to +158 °F) |
Commercial and Availability Logistics
- Product Condition: Available as New Original (New Surplus) or Refurbished (tested and certified for sensor sensitivity thresholds).
- Warranty: 12-month technical warranty covering sensor degradation, internal relay switching, and microprocessor stability.
- Availability: Discontinued by the manufacturer. Sourced from specialized technical surplus stock. Worldwide dispatch takes 2 to 4 business days depending on calibration validation queues.
- Pricing Notice: Valuation changes dynamically based on regional safety inventory levels and emission testing cycles. Contact us directly for a firm, written quote.
Engineering Considerations and Field Deployment Notes
Shield Grounding Guidelines
To prevent signal drift or erratic flame relay dropouts due to ignition grid interference or high-frequency ambient noise, all instrument wiring shields must be bonded together and connected to earth ground exclusively at the main control panel end. Do not ground the cable shields locally at intermediate junction boxes or at the burner front housing.
Multi-Supply Power Synchronization
If your burner management architecture utilizes more than one independent 24 V DC power supply to run a bank of scanners, ensure that the 24 V DC returns (labeled as DC (-)) are securely linked together to establish a shared reference potential. The 24 V DC return line configuration must remain isolated from direct earth ground to avoid ground loop current corrupting the 4–20 mA signaling path.
Dual-Spectrum Optimization
The DSF-2010-SB processes both UV and IR signals via automated digital signal processing (DSP) loops equipped with automatic gain control. During commissioning, utilize the integrated EASI sighting indicator to optimize the physical viewing path down the sight pipe. Misalignment reduces signal amplitude, causing false “no flame” trips when the burner switches from pilot to low-fire main fuel stages.
Frequently Asked Questions
Can this scanner be deployed directly on a hazardous gas valve train area?
No, the DSF-2010-SB variant is designed specifically for non-hazardous locations. If your process envelope falls under Class I, Div 1 or Zone 1 explosion-proof requirements, you must deploy the specialized hazardous-area model variant configured with an explosion-proof enclosure or internal intrinsic safety modifications.
What is the specific role of the secondary 4–20 mA loop?
While the primary loop provides the dedicated flame amplitude percentage to the Burner Management System (BMS), the secondary 4–20 mA output can be assigned in software to monitor raw sensor background frequencies or auto-gain metrics. This allows maintenance teams to track soot buildup on the optical viewing window over time before it triggers a system failure.
How do I address intermittent fault relay tripping while a healthy flame is visible?
Verify that the incoming supply voltage at the scanner terminal block does not drop below 20 V DC under load. Long wire runs with small gauge conductors often cause voltage drops that trigger the internal watchdog circuit, dropping out the fault relay even if the optical sensors see sufficient flame intensity.
Technical Notice: Always cross-reference the exact suffix markings on your physical label against the Chentronics iScan2 installation manual (e.g., MNL-ISCAN2SB) to verify structural pinouts and software register mapping maps before updating live burner safety loops.
