Oxygen gas transmitter ZD22 D

with displayIP544-20 mA

If you need to reliably monitor oxygen over a long period of time, the ZD22 D transmitter is a durable and economical solution. The ZD22 D transmits measured values and status indications via analog (0.2-1 mA or 4-20 mA) or digital (RS-485) signal, while also displaying them on site. In the event of an alarm, its internal buzzer will warn everybody in the vicinity using a loud acoustic signal. In combination with GfG's reliable controllers it can be installed in new gas detection systems or retrofitted into existing ones. The ZD22 D detects oxygen using a zirconium dioxide sensor (ZD), which is not susceptible to ambient conditions and sensor poisons. The current measured value is displayed on the 2.2-inch display, which lights up red in the event of an alarm. The long-life sensors make the ZD22 D an economical solution for the detection of oxygen in the measuring ranges 10 to 1,000 ppm and 0.01 to 96 % by volume. Its automatic temperature compensation and the linearization of the measuring signals ensure high measuring accuracy. Functional safety and device protection The hardware of the ZD22 D complies with the European Functional Safety Standard DIN EN 61508-2: 2011 (SIL). The housing is protected against the ingress of dust and water (protection class: IP54). An optional weatherproof housing provides additional protection. Communication and service Signals are transmitted via the analog industrial standard (optionally 0.2-1 mA or 4-20 mA) or the digital RS-485 interface (Modbus protocol). The ZD22 D uses two status LEDs to indicate its operating status. The intuitive built-in button interface facilitates service and adjustments on site (one-person adjustment).