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SIL2-capable-Oxygen-Analyzer
DIN-Rail Mounted Safety Integrity Level 2 Oxygen Analyzer for Hazardous Areas
- Meets the requirements of IEC61598 SIL2
- Measurement range: 0 - 25 % O2
- Zirconia Technology
- Analogue 4 to 20 mA output for retransmission of measured signal
- 4 push button user interface
- Process Connection: KF-25 / KF-40
SIL2-capable-Oxygen-Analyzer
From
Product Overview
- Accuracy ± 0.01 %
- Accuracy Detail +/- 0.02 % @ 1 %, +/- 0.01 % @ 0.1 %
- Cable Length 5 m
- Calibration Interval 6 to 12 months
- Connection Note Intrinsically Safe Connection: Voltage Uo = 6 V DC Current intensity Io = 0.2 mA Power Po = 0.3 mW Max. outer inductivity Lo = 1000 mH Max. outer capacity Co = 10 μF
- Control Output Alarm
- Data Interface RS485
- Display Type LCD
- Electrical Output 4 to 20 mA
- Enclosure Material PBT
- Enclosure Ratings IP20
- Flow Rate Note 100 to 500 ml/min (250 ml/min optimal) in a vented atmosphere
- Gas Measurement Range 0 to 25 %
- Indicator Type LCD and LED alerts on analyzer
- Length 70 mm
- Lifetime up to 24 mo
- Operating Humidity 0 to 95% RH, non-condensing
- Operating Temperature, Max 50 °C
- Operating Temperature, Min -20 °C
- Output Detail Relay Contact Outputs RL1 / RL2 / Alarm: Switching power max.: 62.5 V A resp max. 30 W Switching voltage: Um 125 V AC/110 V DC Min. current 10 uA DC Min. voltage 10 mV DC According to IEC 947-5-1 resp. EN 60947 Transistor Output (DO): Switching parameters: < 28 V @ < 50 mA
- Power Consumption 1.5 W
- Process Connection Size 2 in
- Process Connection Type Tri-Clamp
- Relay Output 1 A @ 30 Vdc, 0.5 A @ 125 Vac
- Resolution 0.01%
- Response Time <20 seconds, typically 12 seconds
- Sensitivity 0.02 % +/- 0.01
- Series ID SIL2-capable-Oxygen-Analyzer
- Shelf Life 12 months
- Supply Power Type DC
- Supply Voltage 24 Vdc
- Width 100 mm
Supported Applications
The NTRON SIL O₂ Analyser is a safety instrument designed for oxygen gas measurement, compliant with Safety Integrity Level (SIL) standards. The series supports inertization applications in centrifuges, reactors, mills, glove boxes, and vent headers. It is intended for use with OC-25 and OC-26 sensors as part of the NTRON Gas Measurement product line.
Operating Conditions & Performance
The analyzer operates within a process temperature range of -20...+50 °C (-4...+122 °F) with an ambient humidity rating of 0...95 %rh non-condensing. Measurement ranges are available as 0...25 % and 0...26 %. Accuracy specifications vary by concentration: +/- 0.02 % @ 1 % for the 25 % range, and +/- 0.01 % @ 0.1 % for the same range. The resolution is 0.01 %, with a response time of <20 seconds (typically 12 seconds). Sample flow rates are specified as Flow-through/extractive: 100...500 ml/min (250 ml/min optimal) in a vented atmosphere.
Approvals and Certifications
- ATEX: II (1) G [Ex ia Ga] IIC, II (1) D [Ex ia Da] IIIC Tamb (-20 to +60 °C)
- cETLus: CAN/CSA-C22.2 No. 61010-1, UL-61010-1
- EMC: EN 50270 and EN 61326-3-2
- Low Voltage Directive 2006/95/EC
- EN50104 and IECEx certifications are referenced in documentation revisions.
Configuration Options
The SIL O₂ Analyser is a DIN-rail mounted unit with overall dimensions of 145.5 mm (width) x 100 mm (height) x 70 mm (depth). The housing material is PBT, and the enclosure rating is IP20. Power supply requirements are 24 V DC.
Process Connections
- 2" Tri-clamp / Flow-through
- KF40 flange (available with OC-26M KF40 sensor option)
- Via Oxy Extract: 2" Tri-clamp/ANSI 150
- Direct insertion is listed as an option for the OC-200 series.
Sensor and Output Options
- Sensors: Compatible with OC-25, OC-26, OC-25M sensor option, and OC-26M KF40 sensor option. Sensors utilize Solid State Electrochemical Technology.
- Outputs: 4...20 mA analog output; RS485 communication (noted as not SIL-capable).
Safety and Configuration Notes
The device uses two continuous self-monitoring microprocessors to deliver fail-safe oxygen measurements. Programming of alarm levels is performed by Ntron prior to delivery; customer access requires separate PC software with controlled access per EN 50402 (2017) part 6.1. The analyzer does not automatically detect a failed sensor (e.g., zero output signal); detection must be facilitated by the control protocols of the Safety Instrumented System (SIS) designer/integrator.
Key Product Differences
The series is distinguished as a SIL 2 capable product intended for integration into a Safety Instrumented System (SIS). The end user is responsible for performing the integration and assessing the operational phases of the complete SIS. Documentation revisions indicate specific updates regarding pressure ranges, safe use references, proof testing details, and certification amendments including EN50104 & IECEx.
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