Mini Dew Point Meter, Hygrometer

Model Mini SADP Dew point Meter
mini hygrometer
  • Portable Mini Hygrometer - Hand Size 
  • Range -110 °C to -20 °C (depends on sensor see below)
  • Intrinsically safe rating (option)
  • Accuracy +/- 2 °C Dewpoint
  • Calibrated in °C, °F or ppm(V), ppm(W), ppb, g/m3, lb/million cu.ft.
  • Pressure compensated in 4 selectable pressure units, psig, barg, kg/cm2g, Kpag.
  • Automatic Calibration built in
  • Alpha-Numeric logging (option)
  • Store up to 16000 readings (logging option)
  • Dry down chamber for rapid readings
  • Long life rechargeable Li battery
  • NIST traceable calibration
  • RS232 , RS485 (options)
  • 4-20 mA analog output option

Dew Point
The dew point is defined as the lower temperature to which air must be cooled in order for condensation to occur. The dew point is dependent on the concentration of water vapor present, and therefore on the relative humidity.

Mini Hygrometer
The new Mini SADP is a state of the art portable dewpoint analyzer. The unit is self-contained incorporating the moisture sensor, dry-down chamber, electronics, display and rechargeable battery all in a corrosion and impact resistant plastic casing. The padded carrying case, makes it ideal for heavy use in demanding industrial environments. Ranges are available covering an overall range of -110°C to +20°C dewpoint. ( intrinscially rated option)

The Mini is supplied ready for use, with calibration certificate traceable to NIST, instruction manual, battery recharger, and 6 feet of sample tubing. A ballistic nylon shoulder and belt-mount carrying case is available. 

Dry Down Chamber
The sensor must always be drier than the sample to be measured. The dry down chamber achieves this by keeping the sensor surrounded by desiccant when the instrument is not in use. The sensor is only exposed to the sample gas during a measurement and is never in contact with ambient air.
read position dry down position
Specification of MiniSADP Dew point Hygrometer
Model MiniSADPxx
Sensor Aluminum Oxide Ultra High Capacitance
Range 4 different ranges encompassing an overall range from -110 to +20 degs C dew point ( -148 F to +68F ) and corresponding ranges in ppm, ppb, lb/MMSCF
Display Blue 128 x 64 Dot LCD with LED backlight
Keyboard: 5-key membrane keypad 
Calibration Accuracy +/- 2 degs C dew point scale. +/- 1 ppm (0 - 10 ppm scale )
Resolution:  0.1°C dewpoint / 0.1ppm 
Response time Wet to Dry : -20°C to -60°C - < 60 S 
Dry to Wet : -110°C to -20°C - < 20 S 
Electronic Accuracy  Better than ± 1% of range 
Sample flow range: Flow independent. Normal flow 
2 to 5 Liters per Minute (4 to 10 SCFH) 
Warm up time :  15 Seconds 
Power supply AC Adaptor Supply voltage: 100-240 VAC, 50-60 Hz, 400 ma 
Output: 12 VDC, 15 Watts 
Battery 3.6 V Li-Ion 2.3 Ah capacity 
Charge time: Full charge in 10 hours 
Capacity: 200 hours on a full charge 
Operating conditions Temperature: - 10C to +50C
Humidity: 0 - 98 % RH non condensing
Storage temp: -20C to +60C
Operating Pressure: Atmospheric to 30 psig
Calibration: Supplied with NIST traceable certificate 
Electromagnetic compatibility Certified to BS EN 61326: 1998 
2.5 pounds  
Dimensions: 3.5. x 4.5. x 7.5.
Connections Swaglock
PC Interface  Type: RS 485 
Data Format: 1start bit, 1 stop bit, no parity and no hardware handshaking 
Baud Rate: 9600 
No of addresses: 32 
SOFTWARE:  MS Windows® - based program
ANALOG OUTPUT: 4-20ma, range user settable
LOGGING: 20 alpha-numeric memory locations
Ordering Information
Part # Description Base Price
SADPmini Basic instrument with all standard features $ 5130.00

Intrinsically safe Basic instrument.

IS Rating EX II 1 G EEX ia IIC T4 (Ta = -20C to +50C)

$ 6163.00
Ranges (for custom ranges contact us)
Part # Suffix Dew Point Range Price Added to Base
GY -80C to 0C (-112F to +32C) Dewpoint standard $ 0.00
RD -80C to -20C (-112F to -4F) $ 225.00
BL -80C to +20C (-112F to +68F) $ 225.00
SR -110C to -20C (-166F to -4F) $ 485.00
PL -100C to 0C (-148F to +32F) $ 485.00
Type of Instrument
Part # Suffix Description Price Added to Base
B Base unit with all standard features $ 0.00
F Base unit plus 4-20mA output capability. $ 400.00
L Base unit plus 4-20mA output capability, RS-485, and data logging. $ 800.00
Process connections
Part # Suffix Description Price Added to Base
4 1/4" tube fitting + 1 barbed hose connection $ 0.00
8 1/8" tube fitting + 1 barbed hose connection $ 0.00
Power Connection (for charger) and Output Connection (for type L units only)
Part # Suffix Description Price Added to Base
US US power plug standard $ 0.00
US-U US power plug and USB for Wiundows 2000 or later. $ 0.00
US-S US power plug and serial port $ 0.00
Optional Accessories
Part # Suffix Description Price Added to Base
HC Hard-sided ABS case with weather tight seal and handle $ 275.00
CC Soft-sided nylon carrying case with handle and shoulder strap. $ 155.00
HPR High pressure regulator to 3,000 PSIG, Stainless Steel, 1/4" FNPT connections $ 490.00
LPR Low Pressure Regulator to 250 PSIG, Stainless Steel, 1/4" FNPT connections. $ 250.00
SAL Outlet gauge (for LPR only) 1-1/2in dial, 0-15psi, all stainless steel, 1/8" FNPT connections $ 135.00
F Coalescing filter , stainless steel, for up to 3,000 PSIG, 1/4" FNPT connections $ 320.00
NV Needle valve, stainless steel, for up to 3,000 PSIG, 1/4" compression tube fittings. $ 135.00
FI Flow Indicator 100 PSIG max, 1/4" FNPT connections. $ 355.00
FM Flow Meter with integral needle valve, 100 PSIG max, 1/4 " FNPT connections $ 385.00
HPBH High pressure braided hose to 3,000 PSIG max with 1/4" compression tube fittings. $ 255.00
QC Quick connect fiiting for adapting from SADP to 1/4" FNPT connection. $ 110.00
Accessories for Sulfur Hexafluoride Applications SF6
SF6ST 6ft x 1/8" sample tubing with 1/8" x 1/4" VCO fitting. $ 165.00
SF6NV Needle Valve, stainless steel, for up to 3,000 PSIG, 1/8" compression tube fittings. $ 155.00
SF6FI Flow indicator, 100 PSIG max,1/4" compression tube fittings. $ 385.00

Send an inquiry to our engineering and sales team


Topac Inc. 231 CJC Highway, Suite 103 Cohasset MA 02025 USA
Tel: 781 740 8778 Fax: 781 740 8779

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