The OS-4 Ozone Switch is a powerful yet compact ozone detection and control device designed for industrial applications. Featuring a remote-mount ozone sensor (SM-7), it allows for ozone detection up to 100 meters away from the base unit. This ensures accurate readings while keeping the main device outside high-ozone environments. The electrochemical sensor (SM-EC) provides precise monitoring and control, making it ideal for industrial ozone applications, including HVAC systems, food storage, and ozone generator control.
Key Features of the OS-4 Ozone Switch
- Remote Sensor Capability – The SM-7 sensing module connects to the OS-4 via an included wire and can be mounted up to 100 meters away.
- Electrochemical Sensor for Improved Accuracy – The SM-EC sensor chip ensures reliable ozone measurements with reduced cross-sensitivity to VOCs and other gases.
- Easy-to-Read LCD Display – Shows real-time ozone levels and equipment control status.
- Thermostat-Like Control – Automatically activates ozone generators or alarms based on adjustable ozone concentration set-points.
- User-Friendly Installation – Requires minimal setup and adjustments.
- Pre-Calibrated Replaceable Sensor – The SM-EC sensor chip can be easily swapped without recalibration.
- Temperature and Humidity Compensation – Ensures accurate readings in various environmental conditions.
- Multiple Power Options – Operates on 12-24 VDC or AC adapters available worldwide.
- Alarm Integration – Can be used as an ozone leak alarm or failure alarm for all sizes of ozone generators.
- Multiple Output Options – 0-2V, 4-20mA, and RS-232 digital output for seamless integration with data loggers and monitoring systems.
- Programmable Alarm Set-Points – Set customizable ozone concentration thresholds for control and alerts.
Typical Applications
The OS-4 is widely used in industrial and environmental applications where precise ozone monitoring and control are required:
- Food and Agriculture – Monitor ozone levels in fruit and vegetable storage areas to preserve freshness.
- HVAC Systems – Ensure safe and efficient ozone levels in ozonated HVAC systems.
- Ozone Generator Control – Automatically adjust ozone output in industrial odor control, water treatment, and sterilization applications.
- Ozone Leak & Failure Alarm – Detect leaks and prevent unsafe ozone exposure in ozone treatment facilities.
OS-4 Technical Specifications
| Specification | Details |
|---|---|
| Detection Range | 0.03-20 ppm (Electrochemical sensor) |
| Accuracy | 10-15% (Application dependent) |
| Response Time | Immediate |
| Temperature & Humidity | 5-40°C, 20-95% RH |
| Measurement Principle | Electrochemical Sensor |
| Display | LCD screen with indicator lights |
| Power Requirements | 12-24 VDC (AC adapter available) |
| Output Control | SPDT non-latching relay (5A, 250VAC) |
| Alarm Indicators | Green LED (Instrument On), Yellow LED (>0.1 ppm warning), Red LED (Ozone Generator On) |
| Analog Outputs | 0-2V, 4-20mA |
| Digital Output | RS-232 |
| Housing | Flame-resistant ABS with mounting ears |
| Dimensions | 127 × 64 × 42 mm (5 × 2.5 × 1.625 in) |
| Weight | 200 g (7 oz) |
| Recommended Use | Industrial applications – Not recommended for human safety monitoring |
SM-EC Replacement Sensor: Easy & Cost-Effective Calibration
Unlike traditional ozone sensors requiring frequent recalibration, the OS-4 uses the SM-EC sensor chip, which is:
- Pre-calibrated for plug-and-play replacement.
- Cost-effective, reducing long-term maintenance expenses.
- Designed for high-humidity environments, minimizing interference from VOCs or other gases.
OS-4 vs. Previous Models
- The OS-4 now exclusively uses the SM-7 sensor module with the SM-EC sensor chip.
- Older SM-6 sensors with SM-X replacement chips are no longer available.
- If upgrading from an older system, you will need to purchase the new SM-7 sensor module.
Remote Sensor Capabilities: Extendable for Large-Scale Applications
By default, the OS-4 comes with a 6-foot cable connecting the OS-4 base unit and the SM-7 sensor. This allows for installation in a separate room for safety and convenience.
For longer distances:
- Standard telephone wire works up to 100 feet.
- For 100-328 feet, use shielded 22-gauge wire.
- For distances over 328 feet, an 18-gauge shielded cable has been successfully tested up to 1,000 feet.
If you need help setting up an extended remote sensor, contact us for expert assistance.
Wireless Monitoring & Data Logging Kit
Upgrade your OS-4 Ozone Switch with a Wireless Monitoring & Data Logging Kit, allowing for:
- Remote access to ozone levels via an internet connection.
- Instant text and email alerts when ozone levels exceed safe limits.
- Data logging for compliance and safety records.
Why Choose the OS-4 Ozone Switch?
The OS-4 Ozone Switch is the perfect ozone control and monitoring solution for industrial applications requiring:
Accurate, remote ozone detection up to 100 meters away
Automated control of ozone generators, alarms, and ventilation systems
User-friendly, plug-and-play installation
Cost-effective maintenance with pre-calibrated, replaceable sensors
Multiple integration options with analog and digital outputs
For those in food storage, HVAC, water treatment, or industrial ozone control, the OS-4 is a powerful, precise, and reliable solution.
You can find this product here: https://www.gas-sensing.com/os4-ozone-monitor.html
We are looking for an Ozone detector that can be set to automatically close a relay to activate ventilation equipment in our mechanical room.
Hey John! We do have ozone detectors that can be configured to automatically close a relay and activate ventilation equipment.
Please email us at sales@gas-sensing.com with your specific requirements (such as ozone concentration setpoint and relay specifications), and we’ll recommend the best solution for your application.
Looking forward to assisting you!