DOX – Oxygen Sensor with Digital Data Transmission.
The DOX sensor is designed for continuous measurement of oxygen concentration in the air. The measuring head is equipped with an electrochemical sensor and can be placed directly on the monitor housing or connected via a cable up to 30m long. The inlet of the measuring head is protected by a replaceable filter.
The DOX sensor is powered from the surface station via a standard telephone line. In case of power line failure, the device can continue further operation thanks to the built-in battery (optional).
Data from/to the monitor is transmitted via the same line. It is possible to connect four DOX sensors to one line. The device has two digital outputs, galvanically isolated, for automatic signaling of a dangerous drop in oxygen concentration. Alarm thresholds are set by the system operator and sent to the DOX monitor.
The upper part of the enclosure contains an optical signaling device to indicate that the alarm thresholds have been exceeded. The entire unit is enclosed in a waterproof, rugged housing.
Features of the device:
- Continuous measurement of oxygen content in the air
- High accuracy of measurements
- Two two-state outputs
- Two general-purpose two-state inputs
- Data transmission via power line
- Up to four sensors on one line
- Measurement range: 0 – 25% O2
- Measurement error: 0,3% O2
- T90 response time: <45 s
- Maximum resistance of the telephone line: 700 Ω
- Transmission standard: V23 FSK
- Operating temperature range: -10°C to +40°C
- Humidity range: 0 - 95% RH
- Dimensions: 123x180x58 mm
- Waga: 3,5 kg