Advanced Generation of Intrinsically Safe Portable Dewpoint Hygrometers

The most responsive and reliable portable hygrometer available, offering fast spot-check measurement of trace moisture content in industrial process gases and dry compressed air. The SADPmini2-Ex is certified Instrinsically Safe for use in hazardous area applications, flammable or explosives gases, to ATEX, IECEx and cULus.

The rugged, lightweight construction enables measurement in the toughest of environments while the ultra-high capacitance sensor gives unsurpassed accuracy, sensitivity, speed of response, repeatability and long term stability.

SADPmini2 Intrinsically Safe Certification

SKU: SADPmini-Ex Category:


Alpha Moisture Systems has over 25 years of experience in the development, manufacture, supply and service of portable dewpoint hygrometers. Our dewpoint meters are in use in laboratories and industrial processes in almost every country in the world. We are proud to be a vital suppler to the oil & gas, petrochemical, power generation, medical, semi-conductor, pharmaceutical, aerospace, metrology, research laboratories, plastics, nuclear and many other industries.

Our most advanced development yet is the SADPmini2-Ex. This recently launched dewpoint analyser sets a new industry standard in fast, accurate and reliable measurement of trace moisture in industrial process gases and dry compressed air. Designed for use in hazardous areas and certified intrinsically safe to ATEX, IECEx and UL standards, the SADPmini2-Ex is ideal for spot check measurement in the toughest of industrial environments.

The strong and rugged IP66 housing incorporates an ultra-high capacitance sensor which offers unparalleled sensitivity, speed of response, repeatability and stability. The unparalleled speed of response for spot checking is made possible by the unique desiccant head assembly design which ensures the sensor is kept very dry, to low ppb levels, prior to measuring moisture content of the sample gas. Our unique autocalibration function allows immediate verification of the system, minimising downtime and calibration costs. The SADPmini2-Ex dewpoint hygrometer is lightweight and genuinely portable, with a rechargeable lithium-ion battery offering in excess of 150 hours of continuous use on a single charge.

Incorporating the latest technology, the SADPmini2-Ex dewpoint hygromemer offers the user full control via an intuitive, easy to use menu. This allows display of measurement in two independently selectable units simultaneously. Powerful datalogging and Bluetooth connectivity are standard features. A mobile app is available for display of reading on smartphone or tablet.


Span correction facility for ensuring optimum accuracy between laboratory calibrations

LCD Display

Full colour LCD displaying multiple engineering units simultaneously, realtime graphing and screenshot features


Rechargeable lithium-ion battery offering in excess of 150 hours use in continuous operation

Selectable Units

Measurement units selectable in °C or °F and absolute values in ppm(v), ppm(w), mg/m³ or lb/MMSCF

10 Languages

Display in 10 languages: English, French, German, Spanish, Italian, Portuguese, Russian, Chinese, Japanese & Korean

Pressure Calculations

Integral pressure calculator for displaying pressure dewpoints

Data Logging

Flexible programming & data logging with capacity in excess of 300,000 data points


Bluetooth connection to a PC, smart phone or portable printer

Smartphone App

Receive Bluetooth data via the SADPmini2 User App for Android or iOS devices

ATEX Certification Logo

ATEX Certification

II 1G Ex ia IIC T4 Ga (-20°C ≤ Ta ≤ +50°C)
II 2D Ex ia IIIB T60°C T5080°C Db (-20°C ≤ Ta ≤ +50°C)

IECex Certification Icon

IECEx Certification

Ex ia IIC T4 Ga (-20°C ≤ Ta ≤ +50°C)
Ex ia IIIB T60°C T<sub>50</sub>80°C Db (-20°C ≤ Ta ≤ +50°C)

UL Certification Icon

UL Certification

Intrinsically Safe / Sécurité Intrinsèque Exia
Class I Div 1 Groups A, B, C and D (-20°C ≤ Ta ≤ +50°C)

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Technical Information


ATEX Certification II 1G Ex ia IIC T4 Ga (-20°C ≤ Ta ≤ +50°C)
II 2D Ex ia IIIB T60°C T5080°C Db (-20°C ≤ Ta ≤ +50°C)
Class I Div 1 Groups A, B, C and D (-20°C ≤ Ta ≤ +50°C)
IECEx Certification Ex ia IIC T4 Ga (-20°C ≤ Ta ≤ +50°C)
Ex ia IIIB T60°C T5080°C Db (-20°C ≤ Ta ≤ +50°C)


Sensor Type Ultra High Capacitance Aluminium Oxide
Ranges -100 to 0°C dewpoint (-148 to +32°F) | 0.014 to 6000 ppm(v)
-120 to -20°C dewpoint (-184 to -4°F) | 0.001 to 1000 ppm(v)
-80 to +20°C dewpoint (-112 to +68°F) | 0.5 to 23,000 ppm(v)
Other dewpoint ranges available on request
Accuracy Better than ±2°C dewpoint (±3.6°F)
Repeatability Better than ±0.3°C dewpoint (±0.54°F)


EMC Conforms to EMC Directive 89/336/EEC, amended 95/31/EEC
Battery Rechargable Li-ion battery
Battery Life : In excess of 150 hours continuous use
Display 3.5″ full colour LCD display with backlight
240 x 320 resolution display
Warm Up Time 2 seconds


Dimensions Width : 108mm (4.25")
Height : 215mm (8.46")
Depth : 124mm (4.88")
Weight 1.40kg (3.10lb)
Ingress Protection IP66 | NEMA4X Weatherproof Rating
Operating Temperature -10°C to +50°C (14°C to 122°F)
Storage Temperature -10°C to +50°C (14°C to 122°F)


Data Storage Up to 300,000 time-stamped data points
20 user definable folders
Logging Frequency User selectable intervals – 5 seconds to 1 hour
Data Display Graphical or numerical
Real Time Logging View or record data directly to PC via USB or Bluetooth

Box Contents


Product Downloads

Here you’ll find data sheets, technical information and user manuals for the SADPmini2.

Data Sheet

Quick Start Guide

SADPmini2 User App

The SADPmini2 User App is available for both Android and iOS devices, you can download the application using the buttons below:

Apple App Store Button
Google Play Store Button

Please Note : The SADPmini2 User App Bluetooth connectivity and logging facilities are only compatible with the SADPmini2 with Data Logging and the SADPmini2-Ex

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