Temperature sensor VisiFerm mA 225 H3

oxygendissolved oxygencalibration

The VisiFerm mA 225 H3 is the next generation optical dissolved oxygen (DO) sensor for use in explosive environment. Designed especially for production environments, the VisiFerm mA is a 2-wire sensor with 4-20 mA standard or digital HART signal output, and ATEX, UKEx & IECEx approval. The VisiFerm optical technology improves the measuring performance and simplifies maintenance. Improvements compared to conventional electrochemical (amperometric) sensors include flow independence, rapid startup with no polarization time, and no nA noise. It requires less maintenance than an amperometric oxygen sensor as it does not have a mechanically sensitive membrane or a corrosive electrolyte. The VisiFerm mA mitigates the negative effects of aging, temperature, and photobleaching in order to reduce the frequency of calibration and deviation reports. Specifications a-length - 215 mm Electrical Connector - M12 Measurement Principle - Oxygen dependent luminescence quenching, temperature compensation Measuring Range - 4 ppb to 25 ppm (DO) 0 to 62.85 %-vol or 0 to 300 %-sat Accuracy at 25 °C - 1 ± 0.05 %-vol: 21 ± 0.2 %-vol; 50 ± 0.5 %-vol Drift at Room Temperature - < 1 % per weekAdditional specifications Sensor Cap - ODO Cap H3 Electrolyte - None Oxygen Consumption - None Temperature Sensor - NTC 22 kOhm Configurable Values - DO: mbar; %-sat; %-vol; µg/l; mg/l; ppb/ppm (gas); ppb/ppm (dissolved oxygen); Temperature: °C Diameter - 12 mm Process Connection - PG13,5 Wetted Parts - Stainless Steel 1.4435 EPDM (Ethylene propylene elastomer) VMQ (Silicone elastomer) See compliance details in Material Specification document Surface Quality of Steel - Ra < 0.4 µm (N5)