Products > SILO2 Oxygen Analyzer
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Sil-O2 Datasheet
Sil-O2 Operating Manual
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Overview
The complete system (analyzer and sensor) meets the requirements of IEC 61508 SIL2. A fast response, high repeatability and no sensor drift make this analyzer a low maintenance solution that delivers reliable performance for safety critical, process control applications.
Features
- Meets the requirements of IEC61598 SIL2
- Measurement range: 0 - 25% O2
- Solid State Ceramic Electrode sensor technology
- Suited to harsh process applications
- LCD display
- Analogue 4 to 20mA output for retransmission of measured signal (SIL2 Rated)
- RS485 communications
- 24VDC power supply
- 1 Transistor output
- 2 pushbuttons for span calibration
- Process Connection: KF-40 / Tri-Clamp Base / Flowthrough base
Applications
- Gas generation (oxygen / nitrogen)
- Additive manufacturing
- Pharmaceutical industries
- Industrial gas applications
More details
Electrochemical Sensor
The key elements of the electrochemical sensors are a membrane, cathode, anode, electrolyte and measurement circuit. The sensing membrane (covering the cathode) is made of PTFE and is mounted over a metal perforated electrode. The space between the membrane and the electrode is filled either with an aqueous alkaline or an acid electrolyte. In normal operation, all portions of the anode and cathode are immersed in the electrolyte. As oxygen diffuses through the membrane into the electrolyte it causes a reaction between the cathode and anode generating an EMF. This current is proportional to the amount of oxygen present in the sample gas. In the absence of oxygen there is no output from the electrochemical sensor, meaning only one calibration is required.
The key elements of the electrochemical sensors are a membrane, cathode, anode, electrolyte and measurement circuit. The sensing membrane (covering the cathode) is made of PTFE and is mounted over a metal perforated electrode. The space between the membrane and the electrode is filled either with an aqueous alkaline or an acid electrolyte. In normal operation, all portions of the anode and cathode are immersed in the electrolyte. As oxygen diffuses through the membrane into the electrolyte it causes a reaction between the cathode and anode generating an EMF. This current is proportional to the amount of oxygen present in the sample gas. In the absence of oxygen there is no output from the electrochemical sensor, meaning only one calibration is required.
Sensor Construction
The main body of the sensor is fabricated from high density PVDF. The supporting ring at the face of the sensor is constructed of stainless steel. This results in an oxygen sensor that is chemically resistant to most sampling atmospheres and can be used with trace solvents and hydrocarbons present in the sample gas, unlike zirconia (due to the high temperature of the sensor).
Low maintenance and cost of ownership
Due to the highly stable nature of the sensor, a calibration interval of once per year is required, allowing for significant cost savings.
Installation Flexibility
Designed for the ambient detection of low Oxygen concentration with ease of installation.
The main body of the sensor is fabricated from high density PVDF. The supporting ring at the face of the sensor is constructed of stainless steel. This results in an oxygen sensor that is chemically resistant to most sampling atmospheres and can be used with trace solvents and hydrocarbons present in the sample gas, unlike zirconia (due to the high temperature of the sensor).
Low maintenance and cost of ownership
Due to the highly stable nature of the sensor, a calibration interval of once per year is required, allowing for significant cost savings.
Installation Flexibility
Designed for the ambient detection of low Oxygen concentration with ease of installation.
Technical Specifications
| Performance | ||
|---|---|---|
| Measurement Technology | Solid State Cermaic Electrode | |
| Measurement Range | 0 to 25% | |
| Output resolution ( for %) | 0.01% | |
| Accuracy | ±2% of reading at 20°C | |
| Response time (T90) | < 12 seconds | |
| LDL (Sensitivity) | 0.01% | |
| Temperature range | -20˚C to +50˚C | |
| Pressure range | Vented to atmosphere during operation and calibration | |
| Linearity | ±1% of range | |
| Life expectation | 2 year | |
| Humidity | 0-95% RH non-condensing | |
| Warm up time | 15 seconds | |
| Electrical Input / Output | ||
| Power supply | 24VDC | |
| Power consumption | Maximum load 160mA | |
| Electrical Connection | Screw terminals - quick disconnect. 2.5mm CSA Max | |
| Signal output | 4-20mA active | |
| Digital output options | 2 configurable alarm relays, 1 x transistor | |
| Display format | % O2 | |
| Visual Indicators | LED and LCD Alerts on device | |
| Mechanical Specifications | ||
| Dimensions | 114.5mm (h) x 67mm (w) x 100mm (d) | |
| Weight | Approx 300g | |
| Mounting | Din Rail | |
| Environmental rating | IP54 | |
| Housing material | PBT | |
| Certification | Complies with EMC Directive 2004 / 108 / EC. UL/ETL Certification Number: UL-61010-1 | |