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Technical Data for Alicat MCQ and MCRQ Mass Flow Controllers
0 to 0.5 sccm Full Scale through 0 to 3000 slpm Full Scale
Standard Operating Specifications (Contact Alicat for available options)
Performance
MCQ & MCRQ Mass Flow Controller
Accuracy at calibration
conditions after tare
± 2% of Full Scale
Repeatability
± 0.2% Full Scale
Zero Shift and Span Shift
0.02% Full Scale / ºCelsius / Atm
Operating Range / Turndown Ratio
2% to 100% Full Scale / 50:1 Turndown
Maximum Controllable Flow Rate
102.4% Full Scale
Maximum Measurable Flow Rate
up to 128% Full Scale (Gas Dependent)
Typical Response Time
100 ms (Adjustable)
Warm-up Time
< 1 Second
Communications / Power
MCQ & MCRQ Mass Flow Controller
Monochrome LCD or Color TFT
Display with integrated touchpad
Simultaneously displays Mass Flow, Volumetric Flow, Pressure and Temperature
Digital Input/Output Signal
1
Options
RS-232 Serial / RS-485 Serial / Modbus / EtherNet IP / DeviceNet / PROFIBUS
Analog Input/Output Signal
2
Options
0-5 Vdc / 1-5 Vdc / 0-10 Vdc / 4-20 mA
Optional Secondary Analog
Input/Output Signal
2
0-5 Vdc / 1-5 Vdc / 0-10 Vdc / 4-20 mA
Electrical Connection Options
8 Pin Mini-DIN / 9-pin D-sub (DB9) / 15-pin D-sub (DB15) / 6 pin locking
Supply Voltage
MCQ:
12 to 30 Vdc (15-30 Vdc for 4-20 mA
outputs)
MCRQ:
24 to 30 Vdc
Supply Current
MCQ
: 0.250 Amp
MCR
:Q 0.750 Amp (
MCRQH
: 2.0 Amp)
1. The
Digital Output Signal
communicates Mass Flow, Volumetric Flow, Pressure and Temperature
2. The
Analog Output Signal
and
Optional Secondary Analog Output Signal
communicate your choice of Mass
Flow, Volumetric Flow, Pressure or Temperature
Operating Conditions
MCQ & MCRQ QMass Flow Controller
Mass Reference Conditions (STP)
25ºC & 14.696 psia (standard — others available on request)
Operating Temperature
−10 to +60 ºCelsius
Humidity Range (Non–Condensing)
0 to 100%
Max. Internal Pressure (Static)
145 psig
Proof Pressure
175 psig
Mounting Attitude Sensitivity
MCQ:
None
MCRQ:
Mount with valve cylinder vertical & upright
Valve Type
Normally Closed
Ingress Protection
IP40
Wetted Materials
MC:
303 & 302 Stainless Steel, Viton®, Heat Cured Silicone Rubber, Glass Reinforced
Polyphenylene Sulfide, Heat Cured Epoxy, Aluminum, Gold, Brass, 430FR Stainless
Steel, Silicon, Glass.
MCR:
303 & 302 Stainless Steel, Viton®, Heat Cured Silicone Rubber, Glass Rein-
forced Polyphenylene Sulfide, Heat Cured Epoxy, Aluminum, Gold, 416 Stainless Steel,
Silicon, Glass. If your application demands a different material, please contact Alicat.
Range Specific Specifications
Full Scale Flow Mass
Controller
Pressure Drop
1
at FS Flow
(psid) venting to atmosphere
Mechanical
Dimensions
1
Process Connections
2
MCQ
0.5 sccm to 50 sccm
1.0
4.4”H x 3.4”W x 1.1”D
M-5 (10-32) Female Thread
3
MCQ
100 sccm to 500 sccm
1.0
4.6”H x 3.6”W x 1.1”D
1/8” NPT Female
MCQ
1 slpm
1.5
MCQ
2 slpm
3.0
MCQ
5 slpm
2.0
MCQ
10 slpm
5.5
MCQ
20 slpm
20.0
MCRQ
50 slpm
2.0
5.7”H x 7.7”W x 2.3”D
1/4” NPT Female
MCRQ
100 slpm
3.2
MCRQ
250 slpm
2.4
6.0”H x 7.7”W x 2.3”D
1/2” NPT Female
MCRQ
500 slpm
6.5
6.0”H x 7.3”W x 2.3”D
3/4” NPT Female
(A 1-1/4” NPT Female process
connection is available for
2000 slpm controllers.)
MCRQ
1000 slpm
14.0
MCRQ
1500 slpm
17.0
MCRQ
2000 slpm
28.6
6.0”H x 8.1”W x 2.9”D
MCRQH
3000 slpm
16.8
6.0”H x 8.9”W x 2.9”D
1-1/4” NPT Female
2. Compatible with Swagelok® tube, Parker®, face seal, push connect and compression adapter fittings. VCR and SAE
connections upon request.
3. Shipped with M-5 (10-32) Male Buna-N O-ring face seal to 1/8” Female NPT fittings.
Alicat MCQ and MCRQ units are for high pressure applications.
The flow rate is dependent on the pressure in that lower
pressures will yield lower flow rates. The Q series should only be ordered after consulting Alicat. MCQ units are calibrated
for operation at high pressure. Optimal performance is achieved at higher operating pressures.
Minimum Operating Pressure – 30 psia
Maximum Operating Pressure – 320 psia