CC33 stainless steel transmitter

The CC33 uses catalytic combustion (CC) to detect flammable gases and vapours such as methane, propane and hydrogen as well as ammonia. Their long-life sensors make 33 series transmitters an economical solution for detecting a wide range of combustible gases in the measuring ranges 0 to 100 % LEL and 0 to 4 % by volume (NH3). Its automatic temperature compensation and the linearisation of the measuring signals ensure high measuring accuracy. In the event of an alarm, two red LEDs light up and the display colour changes to red. The three optional relay outputs can be used to automatically trigger an explosion-proof buzzer, visual warnings such as flashing lights or the ventilation in case of an alarm.

Communication and service
Signals are transmitted on the analogue industrial standard (4-20 mA) or via the digital RS-485 interface (Modbus protocol). The CC33 is also able to utilise ACDC technology, which enables it to transmit digital data on analogue, three-wire lines in systems using an ACDC-capable controller. It uses two status LEDs to indicate its operating status and also features two additional alarm LEDs and three relay LEDs. It also features two additional alarm LEDs and three relay LEDs. Service and adjustments can be carried out on site with a magnetic pen and three magnetic buttons behind 15 mm thick bullet-proof glass (one-person adjustment). The pre-adjusted sensors can be easily replaced thanks to Smart Sensor technology. The multi-colour backlit display shows the current measured value, status messages and the CC33's menu. Test gases for function tests can be inserted using a calibration adapter. Alternatively, when the device is mounted in a difficult-to-reach location, an optional remote calibration adapter can be used without impairing the transmitter's stack effect. 

Explosion and equipment protection
The CC33 is approved for use up to Ex zone 1 and meets the requirements of ignition protection type "d" (flameproof enclosure). The unpainted stainless steel housing and Viton seals guarantee a long operating time even in the toughest conditions. The transmitter is protected against the ingress of dust and water according to IP54. If required, the protection class can be raised to IP67 with additional thread seals. For any applications not requiring a stainless steel housing, the CC33 is also available in a painted aluminium housing.

Key features at a glance:

General information:

• Measuring principle: catalytic combustion (CC)
• For flammable gases and vapours
• Pressure-resistant encapsulated housing made of stainless steel with bulletproof glass (15 mm)
• 2.2-inch colour display
• Expected sensor lifetime: 5 years
• Signal transmission: 4-20 mA / RS-485 / ACDC
• Protection class: IP67 (with thread sealing, otherwise IP54)

Approvals / Certifications:

• ATEX certification: II 2G Ex db IIC T6 Gb
  (II 2G Ex db ib IIC T4/T6 Gb with buzzer)

Optionally available:

• Three relay outputs, magnetic rod, windscreen, flow adapter, remote calibration adapter, buzzer, threaded plug, cable gland