ZD22 D Transmitter
Transmitter with display for selective oxygen monitoring
If oxygen is to be monitored selectively and over a long period of time, the ZD22 D transmitter is a reliable and economical solution. The ZD22 D transmits measured values and status displays analogue (0.2-1 mA or 4-20 mA) or digital (RS-485). In addition, there is an on-site indication on the display and, in the event of an alarm, a local warning via buzzer. In combination with GfG's proven controllers, installation in new gas detection systems as well as retrofitting in existing systems is possible.
The ZD22 D detects oxygen by means of a zirconium dioxide sensor (ZD), which is insensitive to ambient conditions and sensor poisons. The current measured value can be read at any time 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. Automatic temperature compensation and linearisation 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 according to the analogue industrial standard (optionally 0.2-1 mA or 4-20 mA) or via the digital RS-285 interface (Modbus protocol). The transmitter indicates operating states via two status LEDs. Service and settings are carried out intuitively on site with a built-in touch-button interface (one-man adjustment). The multicolour backlit display shows the current measured value, status messages and the menu of the ZD22 D. Test gas can be applied for function control with a calibration adapter.
Key features at a glance:
- measuring principle: zirconium dioxide (ZD)
- for oxygen
- expected sensor lifetime: 4-5 years
- 2.2-inch colour display, built-in touch-button interface, buzzer
- signal transmission: 0.2-1 mA / 4-20 mA / RS-485
- protection class: IP54
Approvals / Certifications:
- SIL 2/3 (hardware)
- RC22 operating unit, weatherproof housing, calibration adapter