The SDHmini-Ex is designed for quick and reliable spot check measurements of trace moisture in gases and dry compressed air. Suitable for a wide range of industries including power generation, semi-conductor manufacture and pharmaceuticals.

As with all SHAW dewpoint meters and hygrometers, the SDHmini-Ex utilises the SHAW ultra high capacitance aluminium oxide sensor. Proven over many years, this sensor is fast responding, reliable and highly accurate with an overall range of -100 to +20 degrees Celsius dewpoint.

A key feature of the SDHmini-Ex is the desiccant head assembly. The unique design of the head assembly keeps the sensor dry between tests to ensure the instrument is always ready to carry out rapid spot checks. This is achieved by surrounding the sensor with desiccant before the head is lifted for sampling. At no time is the sensor allowed to come into contact with ambient air, as the desiccant and sensor are always isolated. This unique feature allows the operator to achieve a meaningful reading in 5 – 10 minutes.

Another key feature of the SDHmini-Ex is the AutoCal function. The SHAW dewpoint sensor can be exposed to any atmosphere which is wetter than its operating range by raising the desiccant head and performing the AutoCal feature on the instrument, generally, room air is sufficient. The dewpoint sensor is now set up with the instrument and ready to use.

AutoCal allows users to ensure accuracy between laboratory calibrations by checking the span of the hygrometer and correcting for any deviation. It can be carried out in situ and without any special equipment. This useful feature reduces downtime, minimizes calibration costs, gives immediate verification of the dewpoint system and allows users to ensure optimum measurement accuracy between laboratory calibrations.

The SDHmini-Ex hand held hygrometer is durable and robust, incorporating a large, colour, graphics LCD display, which shows two units of measurement simultaneously. For example, a primary display can be set in degrees Celsius and secondary in ppm or the display can be set to show an atmospheric dewpoint and corresponding pressure dewpoint reading.

The intuitive menu system allows simple operation of the instrument and can be viewed in 10 different languages and has real time graphing, screen shot features and selectable engineering units.

The rechargeable lithium-ion battery provides over 150 hours of continuous operation on a full charge and the instrument is charged via USB or a plug type to suit your geographical location.

This model includes advanced data logging with download to PC capability, up to 300,000 readings can be captured and displayed with USB. The SDHmini-Ex incorporates Bluetooth interfaces for connectivity and printing with a compatible Bluetooth printer also available.

The SDHmini-Ex is suitable for use in hazardous environments and is certified intrinsically safe to ATEX, IECEx and UL standards, the perfect tool for reliable measurements in hazardous areas.

All SDHmini instruments are supplied with an anti-static carry case and include a pressure calculator, instruction manual, PTFE sample hose and stainless steel inlet and outlet fittings, which can be supplied to meet customer requirements.

To assist with sampling directly from process lines, SHAW manufacture a compatible sample system for the SDHmini instruments. The SDH Portable Sample System is an effective self-contained sampling system, which ensures that the sample pressure and flow are suitable for dewpoint measurement whilst protecting your hygrometer from high pressures and contaminants.