Michell Instruments DG Specifications

Calibration Instruments

DG2

Dew-Point Generator

The DG2 has two stages of gas-fl ow mixing which allow
it to generate dew points down to -75°Cdp (-103°Fdp).
The great strengths of the DG2 are its ease of use and
its fl exibility in manually generating an accurate target
dew point by fi ne tuning the gas mix via its fl ow metering
valves. Infi nite mixing is achievable within its working
range.

Air Source Dryer Generator Reference

Technical Specifi cations

Mixing stages 2 stage
Humidity range -75 to +20°Cdp (-103 to +68°Fdp)
Gas supply 8 Nl/min (17 scfh) -1 air @ 1 barg (11 psig) and

-75°Cdp (-103°Fdp)

Gas output 1 to 5 Nl/min (2.1 to 10.6 scfh) air @ 0.5 to 1

barg (7 to 14 psig)

Filter Particulate fi lter
Saturator Polycarbonate and porous polyethylene sinter
Heating Finned heating elements, 500 watts, fan circulation
Power supply 220 to 240 V, 50Hz or 100 to 120 V; 60Hz
Storage temperature +5 to +40°C (+41 to +104°F) (with saturators

empty)

Operating temperature +18 to +24°C (+64 to +75°F)
Enclosure size 19" sub-rack x 12U high x 400mm (15.8") deep
Weight 20kg (44lbs)

Dimensions

Front View

483mm

465mm

Highlights

• Operation range of -75 to +20°Cdp (-103 to +68°Fdp)
suiting the vast majority of calibration requirements

• Simple operation through manual fl ow mixing

• Flexibility in generating precise target dew-point
temperature

• Generated output responds quickly to a change of set
point

• Stable humidity generation

Michell Instruments Ltd, Rotronic Instruments Corp. 135 Engineers Road, Suite 150, Hauppauge NY 11788
Tel: [phone], Email: [e-mail], Web: www.michell.com/us

Please note: Michell Instruments adopts a continuous development program which sometimes
necessitates specifi cation changes without notice. Please contact us for latest version.
Issue No: DG2_97333_V1.1_US_0618

192mm

533mm

192mm

Depth: 400mm

www.michell.com

Calibration Instruments

DG3

Dew-Point Generator

The DG3 is our entry-level, single-stage mixing humidity
generator. It is operated by manually mixing the two
gas streams using fl ow control valves. The DG3 provides
fl ows up to 5 Nl/min (10.6 scfh) and generates dew points
ranging from -40 to +20°Cdp (-40 to +68°Fdp). Infi nite
mixing is achievable within its working range.

Air Source Dryer Generator Reference

Technical Specifi cations

Mixing stages 1 stage
Humidity range -40 to +20°Cdp (-40 to +68°Fdp)
Gas supply 6 Nl/min (12.7 scfh) air @ 0.75 barg (11 psig)

and -75°Cdp (-103°Fdp)

Gas output 1 to 5 Nl/min (2.1 to 10.6 scfh) air @ 0.5 to 1

barg (7 to 15 psig)

Filter Particulate fi lter
Saturator Polycarbonate and porous polyethylene sinter
Heating Finned heating elements, 500 watts, fan

circulation

Power supply 220 to 240 V, 50Hz or 100 to 120 V; 60Hz
Storage temperature +5 to +40°C (+41 to +104°F)

(with saturators empty)

Operating temperature +18 to +24°C (+64 to +75°F)
Enclosure size 19" sub-rack x 6U high x 340mm (13.4") deep
Weight 9kg (20lbs)

Dimensions

Front View

267mm

Highlights

• Consistently dry output over long time periods

• Full analog control of generated dew points across -40
to +20°Cdp (-40 to +68°Fdp) operating range

• Generated output responds quickly to a change of set
point

• Stable humidity generation

• Compact packaging

Michell Instruments Ltd, Rotronic Instruments Corp. 135 Engineers Road, Suite 150, Hauppauge NY 11788
Tel: [phone], Email: [e-mail], Web: www.michell.com/us

Please note: Michell Instruments adopts a continuous development program which sometimes
necessitates specifi cation changes without notice. Please contact us for latest version.

Issue No: DG3_97334_V1.1_US_0618

483mm

Depth: 340mm

www.michell.com

Calibration Instruments

Front View

DG4

Dew-Point Generator

The DG4 is a two-stage push-button dew-point generator
which operates in the range of -75 to +20°Cdp (-103 to
+68°Fdp). It can be delivered with between 3 and 10
factory-set dew point settings, selectable from the front
panel keypad. Its RS232 communication port enables
further automation, particularly when used in conjunction
with a UKAS certifi ed hygrometer. The DG4 offers
maximum fl exibility via its pre-set values combined with
optional manual mixing above -40°C (-40°F) dew point.

Air Source Dryer Generator Reference

Technical Specifi cations

Mixing stages 2 stage
Humidity range -75 to +20°Cdp (-103 to +68°Fdp)
Gas supply 8 Nl/min (16 scfh) (max) @ 0.7 barg / 11 psig

and -75°Cdp (-103°Fdp)

Gas output 1 to 5 Nl/min (2.1 to 10.6 scfh)

(air @ 0.5 to 1 barg (7 to 14 psig))

Filter Particulate fi lter
Saturator Polycarbonate and porous polyethylene sinter
Heating Finned heating elements, 300 watts, fan circulation
Power supply 220/240V, 50Hz or 100/120V; 60Hz
Storage temperature +5 to +40°C (+41 to +104°F)

(with saturators empty)

Operating temperature +18 to +24°C (+64 to +75°F)
Enclosure size 19" sub-rack x 6U high x 330mm (13.4") deep
Weight 25kg (55lbs)

Dimensions

Front View

483mm

Highlights

• Operation range of -75 to 20°Cdp (-103 to +68°Fdp)
suiting the vast majority of calibration requirements

• Simple operation through push-button switching of set
points

• Remote control via RS232 comms

• Generated output responds quickly to a change of set
point

• Stable humidity generation

Depth: 330mm

Michell Instruments Ltd, Rotronic Instruments Corp. 135 Engineers Road, Suite 150, Hauppauge NY 11788
Tel: [phone], Email: [e-mail], Web: www.michell.com/us

Please note: Michell Instruments adopts a continuous development program which sometimes
necessitates specifi cation changes without notice. Please contact us for latest version.
Issue No: DG4_97335_V1.1_US_0618

533mm

www.michell.com

Dew-point range -100 to +20°Cdp (-148 to +68°Fdp)

(factory default preset values= –100, -90, -80,

-70 -60, -50, -40, -30, -20, -10, 0, +10 and
+20°C (+68°F))

Output Stability ±0.5ºC (±0.9ºF)

Required gas supply 30 Nl/min (63.6 scfh) @ 4.8 barg (70 psig)

pressure and <13.8 ppb (–100°C / -148°F

V

atmospheric dew point) moisture content

Gas output 10 Nl/min (21.2 scfh) @ 0.5 barg (7.3 psig)

Cable connection USB (type B) for PC Control

RS485 (9 way D plug) for Setup

Water reservoir Material= ABS

Capacity= 1 litre

Power supply 220 to 240 V AC or 100 to 120 V AC 50/60 Hz

Power consumption 500 Watt maximum

Power connector 3 pin IEC

Power supply fuse 3A (F) quick blow

Operating temperature +10 to +40°C (+50 to 104°F)

Construction Painted diecast aluminum enclosure with smoked

glass door. Overall dimensions =
1020 x 555 x 600mm (40 x 22 x 24")
h x w x d

Weight 65kg (143lbs) maximum

1020mm

VDS3

Dew-Point Generator

The VDS3 is a sophisticated computer controlled dew­point generator that operates in the range of -100 to
+20°Cdp (-148 to +68°Fdp). Individual three stage mass
flow controllers select precise proportions of wet and
pre-mixed air. Humidity injection is achieved by a liquid
mass flow controller and controlled evaporation system.
The Vapor Delivery System (VDS) gives repeatable and
flexible control of the generated dew point and can be
programmed with up to 13 presets that can be activated
manually or as part of an automatic calibration program.

Highlights

• Operation range of -100 to +20°Cdp (-148 to +68°Fdp)

suiting the calibrated range of almost all dew-point
sensors

• Fully automated remote control

• Mass flow controlled mixing of wet and dry flows

ensures complete repeatability of set points

• Generated output responds quickly to a change of set

point

• System optimised for excellent output stability (±0.5°C

/ ±0.9°F)

Michell Instruments Ltd, Rotronic Instruments Corp. 135 Engineers Road, Suite 150, Hauppauge NY 11788

Tel: [phone], Email: [e-mail]

Please note: Michell Instruments adopts a continuous development program which sometimes necessitates
Issue No: VDS3_97336_V1.3_US_0718

© Michell Instruments 2018

, Web: www.michell.com/us

Humidity and Dew-Point Instruments

Air Source Dryer Generator Reference

Technical Specifications

Dimensions

Front View

555mm

Depth: 600mm

specification changes without notice. Please contact us for latest

version.