GfG Instrumentation 2210009 ZD 21 Transmitter for Oxygen (O2), 0.1% Vol. Resolution, 0 - 25% Vol. Range

Long-term monitoring of oxygen concentrations in difficult conditions

In many areas of application, oxygen concentrations must be monitored consistently. If harsh environmental conditions such as varying temperatures, high or low pressure or dry or humid air necessitate a particularly durable transmitter, the ZD21 is a good choice. The sensor operates with a zirconium dioxide oxygen pump cell. This measuring principle enables stable long-term measurement of O₂ in difficult conditions and with short response times.

The ZD21 is characterized by its high selectivity and long-term stability. The sensor can also be installed remotely, with a maximum cable length of two meters between the transmitter and the external sensor. Measuring range - 0 - 25%, 0.1% vol. resolution.

Sturdy and durable

The transmitter housing is made of aluminum. It is protected against the ingress of dust and water (IP54). The O₂ sensors have a sensor lifetime of approximately five years and are not susceptible to CO₂. Temperatures between -30 and +50 °C, very low or very high humidity and extreme pressure do not affect the accuracy of the oxygen measurement.

Communication and service

Changes in the O₂ concentration are detected within a very short time (t90 > 2 s). The ZD21 uses an analog (0.2-1 mA or 4-20 mA) signal to communicate with the controller. Test gases for function tests can be inserted via an optional calibration adapter. On-site adjustment can be performed by a single technician.

Features:

• Measuring principle: Zirconium dioxide (ZD)
• For oxygen
• Optional remote sensor (maximum cable length: 2 m)
• Short response time (t90 < 2 s)
• Expected sensor lifetime: 5 years
• Signal transmission: 0.2-1 mA or 4-20 mA
• Protection class: IP54

For more information, please see Data Sheet and Manual