Envco Australia – Environmental Equipment

Three DMP74 probe models
Three probe models, all with autocalibration, are available. The A and B models are both general purpose probes. The A model is for dewpoint range from -40 to +60 °C Td, and the B model for -60 to +20 °C Td. The C model is specifically developed for SF6 gas with a dewpoint range down to -50 °C Td. The B and C probe models have an additional Sensor Purge feature. The Sensor Purge heats and dries the sensor, making the response from ambient to dry conditions exceptionally fast. This facilitates rapid spot checking measurements in low dewpoints.

Low maintenance due to innovative autocalibration
The DM70 is fitted with the Vaisala DRYCAP® Sensor. The sensor provides reliable and high- performance dewpoint measurement with revolutionary long-term stability. The patented autocalibration procedure detects on-line possible measurement inaccuracies and automatically corrects dry-end drift in the calibration curve. These advanced features provide a long calibration interval and low maintenance cost.

The meter is calibrated in the factory against internationally traceable standards and delivered with a calibration certificate. The DM70 can also be sent to a Vaisala Service Center for a traceable recalibration.

Easy-to-use user interface
The DM70 has a versatile and easy-touse, menu-based user interface and a clear graphical LCD display with datalogger function. It can also be used as a tool for reading the output of fixed Vaisala dewpoint transmitters, like the DMT242, DMT142 and DMT340.

Various display variables
The DM70 displays one to three parameters at a time, either numerically or graphically. Several humidity units can be selected. In addition, the DM70 includes conversion from gas pressure dewpoint to ambient pressure dewpoint. An analog output is also available.

DSS70A portable sampling system
The DSS70A is designed to provide dewpoint sampling flexibility. For processes at atmospheric pressure, a battery powered pump is used to extract a gas sample. For pressurized processes up to 20 bar, the ample is measured at process pressure and then reduced to atmospheric pressure for venting or re- direction, bypassing the pump. In all cases, the sample gas passes through a filter to remove particulate contamination before measurement. Flow through the system is controlled and monitored with a needle valve and flow meter.

Please read specification sheet and order guide prior to placing an order. Vaisala products are professional grade instruments and have options specific to your application. This information needs to be detailed.