640B Integrated Absolute Pressure Controllers

The 640B absolute pressure controller is a self-contained, compact, closed-loop electronic pressure control system containing a Baratron® capacitance manometer, normally closed proportioning control valve, and closed-loop control electronics. Electrically similar to a standard MFC, the 640B is powered by ±15 VDC at only 200 mA, permitting use with standard power supply and display electronics. The pressure output and input control signals are linear 0-5 or 0-10 VDC. Two trip points with LED status indicators are for use as simple on/off process limits.

Integrated Baratron® capacitance manometer technology
Full Scale ranges as low as 10 Torr for low pressure processes
Can be used with upstream or downstream controller applications
Two alarm trip points for process limit control

See All Features

Show Filters:

Showing 10 of 18 total products

Description	Compatibility	Pressure Range	Flow Rate	Price
640B11TW1M12MAbsolute Pressure Controller, 10 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug	UNIVERSAL	10 Torr	200 sccm	$3,587
640B11TW1M12VAbsolute Pressure Controller, 10 Torr, 200 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug	UNIVERSAL	10 Torr	200 sccm	$3,587
640B11TW1M22MAbsolute Pressure Controller, 10 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug	UNIVERSAL	10 Torr	1000 sccm	$3,587
640B11TW1M22VAbsolute Pressure Controller, 10 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug	UNIVERSAL	10 Torr	1000 sccm	$3,587
640B11TW1M32MAbsolute Pressure Controller, 10 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug	UNIVERSAL	10 Torr	5000 sccm	$3,587
640B12TW1M12MAbsolute Pressure Controller, 100 Torr, 200 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug	UNIVERSAL	100 Torr	200 sccm	$3,587
640B12TW1M22MAbsolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug	UNIVERSAL	100 Torr	1000 sccm	$3,587
640B12TW1M22VAbsolute Pressure Controller, 100 Torr, 1000 sccm, 4 VCR-M, Metal Seal, Viton Valve Plug	UNIVERSAL	100 Torr	1000 sccm	$3,587
640B12TW1M32MAbsolute Pressure Controller, 100 Torr, 5000 sccm, 4 VCR-M, Metal Seal, Metal Valve Plug	UNIVERSAL	100 Torr	5000 sccm	$3,587
640B12TW1V12VAbsolute Pressure Controller, 100 Torr, 200 sccm, 4 VCR-M, Viton Seal, Viton Valve Plug	UNIVERSAL	100 Torr	200 sccm	$3,072

Show All

Configuration Options

The following options are available for 640B Absolute Pressure Controllers
Ordering Code Example: 640B13TW1V42V

Configuration Option	Option Code
640B Absolute Pressure Controller	640B
Pressure Range Full Scale
10 Torr	11T
100 Torr	12T
1000 Torr	13T
60 psi	61P
100 psi	12P
Fittings
Swagelok 4 VCR male	W
Swagelok 8 VCR male	T
Swagelok 1/4 in.	S
W-Seal (2787.3F)	H
C-Seal (2787.1)	C
Valve
Normally closed	1
Seal Materials
Viton	V
Kalrez	D
Metal	M
Orifice Size
A (50 sccm)	A
#1 (200 sccm)	1
#2 (1000 sccm)	2
#3 (5000 sccm)	3
#4 (10000 sccm)	4
#5 (20000 sccm)	5
#6 (30000 sccm)	6
Trip Points
With	2
Valve Plug Material
Viton	V
Kalrez	D
Metal	M
Kel-F	F

	Description
	640B Absolute Pressure Controller, Closed-Loop, 640B

Specifications

Type
640B Absolute Pressure Controller
Pressure Range
10, 100, 1000 mmHg (Torr), 60, 100 psi (Full Scale)
Fitting Type
4 VCR, 8 VCR, 0.25 in. Tube, or Surface Mount
Flow Rate
50, 200, 1000, 5000, 10000, 20000, 50000 sccm (nominal Full Scale flow rates for N2 with 15 psig on inlet and atmosphere on outlet)
Trip Points
Two open-collector transistors
Rated: 250 mA @ 30 VDC
Adjustable: 1 to 100% of Full Scale
Hysteresis: 3% of Full Scale
Indicators: Green LED's on when actuated
Pressure Control Accuracy
±0.2% of Full Scale
Transducer Over Pressure Limit
45 psia or 2x Full Scale, whichever is greater
Maximum Differential Pressure
30 psi for 20,000 and 50,000 sccm orifices
150 psi for 50 to 10,000 sccm orifices
(consistent with transducer overpressure limit)
Control Mode
Downstream standard; Upstream optional
Pressure Measurement Accuracy
±0.5% of Reading (includes linearity, hysteresis, and repeatability)
Zero Temperature Coefficient
Zero: ±0.02% of Full Scale/°C
Span Temperature Coefficient
Span: ±0.04% of Reading/°C
Control Range
>2 to 100% of Full Scale
Typical Response Time
<1.0 sec (excluding system time constant)

Operating Temperature
0 - 50°C (32° to 122°F)
Storage Temperature
-20 to 80°C (-4° to 176°F)
External Leak Integrity
<10^-9 scc/sec He
Leak Integrity Through Closed Valve
Elastomer valve: <10^-4 scc/sec He
Metal valve: <1% of Full Scale (N2 @ 1 atm. ΔP)
Kel-F valve: <0.5% of Full Scale (N2 @ 1 atm. ΔP)
(through closed valve)*
Wetted Materials
Standard: 316L S.S., 316L/VAR S.S., Inconel, Nickel
Optional: Viton®, Kalrez®, Kel-F®
Power Required
±15 VDC ±5%, 200 mA maximum
Connector-Interface
15-pin male type "D"
Meter Response Time
<100 msec
RFI Sensitivity
SAMA 33.1, 1-abc: <0.2% of Full Scale
Input-Output Signals
0-5 VDC standard; 0-10 VDC optional
Cable Length
100 feet (30 m) maximum
Weight
2.54 lbs. (1.15 kg)
Dimensions
1.5 inches (38.1 mm) x 4.88 inches (124 mm) (4 VCR) x 5.50 inches (140 mm) maximum
Compliance
CE