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Product Lines » Apex Instruments » flowmeters
flowmeters

Flowmeters (Rotameters)
Apex Instruments offers precision machined acrylic (KFR-Series), molded polycarbonate (KMR-Series), glass tube (KG#-Series), and electronic flowmeters for a variety of applications. We offer precision engineered sizes and scales for a variety of fluids. Millimeter reference or direct read scales can be specified to meet your specific requirements. In addition, NIST traceable calibration and certificates are available for your special needs.
 
                            

KPV9000 Electronic Gas Flowmeters

                                                                                         
GENERAL INFORMATION


The KPV-Series Flowmeter accurately measures the flowrate of non-hazardous, inert gases with an accuracy of ±2% of full scale. The standard output for the KPV meter is 0.2-2.7 VDC; the meter is also available with an integral or remote digital display, or 4-20 mA current signal. The flowmeters are available with full-scale ranges from 50 CCM to 50 LPM, with 50:1 turndowns. KPV9000 Series meters can be installed in any orientation with no effect on the flowrate. All units are supplied with an aluminum body, high-impact polycarbonate case and brass compression fittings.

PRINCIPLES OF OPERATION
The flowrate is determined by measuring the pressure drop across a laminar flow element . As gases move through the flow element, the flow becomes laminar; as a result, the flowrate is linearly proportional to any change in pressure. This creates an accurate output signal, which can be displayed or transmitted as an analog signal. The KPV Series flowmeters measure volumetric flowrate, making them ideal for purging applications.

   KPV Meter Specifications 

RESPONSE TIME:

<50 MILLISEC

ACCURACY:

±2% FULL SCALE

REPEATABILITY AT CONSTANT
TEMPERATURE:

±1% FULL SCALE

TURNDOWN RATIO:

50:1

PRESSURE DROP:

<0.75 PSI

TEMPERATURE RANGE:

10-50° C

SUPPLY VOLTAGE*:

5.3-26 VDC

SUPPLY CURRENT**:

3 mA

OUTPUT VOLTAGE:

0.2-2.7 V

OUTPUT SPAN:

2.5 V

OPTIONAL OUTPUT CURRENT:

4-20mA

MAXIMUM INPUT PRESSURE:

100 PSIG

*Reverse polarity protection to 15 VDC maximum
**10 mA for units with display and RS232 output

KPV Series Flow Rates

CCM OF AIR

MODEL CODE

1-50

2-100

4-200

10-500

KPV050CCM*

KPV100CCM*

KPV200CCM*

KPV500CCM*

LPM OF AIR

 

.02-1

.04-2

.1-5

.4-20

1-50

KPV001LPM*

KPV002LPM*

KPV005LPM*

KPV020LPM*

KPV050LPM*

(*) DISPLAY/OUTPUT OPTIONS

MODEL CODE

DESCRIPTION

00**

NO DISPLAY, VOLTAGE OUTPUT ONLY

0C**

NO DISPLAY. 4-20mA OUTPUT

D0**

DISPLAY, VOLTAGE OUTPUT

DS**

DISPLAY, VOLTAGE OUTPUT & RS232 Port

Standard Gas Options

AIR
O2
N2

A
O
N

CO
CO2
ARGON

CO
C
AR

                  Dimensions         Inches (Millileters)

RANGE

A

B

C

D

UP TO 5 LPM

3.47
(88.14)

.72
(18.29)

.365
(9.27)

1/8" NPT X 1/4" COMPRESSION FITTING

20 LPM

3.75
(95.25)

.996
(25.3)

.584
(14.83)

1/4" NPT X 1/4" COMPRESSION FITTING

50 LPM

3.875
(98.43)

1.126
(28.6)

.714
(18.14)

1/4" NPT X 1/4" COMPRESSION FITTING

Accessory Products

  • PVPS - 120 VAC TO 12 VDC POWER ADAPTER
  • PVPS220 -220 VAC TO 12 VDC POWER ADAPTER
  • ESC062 -6' RIBBON CABLE WITH FEMALE "D" CONNECTORS AND RS232 SERIAL COMMUNICATION PORTS
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