EASTERN INSTRUMENTS

QVT-SV: High Performance Differential Pressure Transmitter

QVT High Performance Differential Pressure Transmitter for measuring the velocity pressure or Differential Pressure across any flow element in order to measure the flow of air through a duct
The QVT-SV High Performance Differential Pressure Transmitter from Eastern Instruments is a differential pressure transmitter that has been optimized for the extremely accurate flow measurement of air and gas at low DP (below 8 in WC). When coupled with any Differential Pressure based flow element, such as averaging pitots, the QVT-SV will output either the differential pressure or the flow via a 4-20 mA signal.

QVT-SV: DIFFERENTIAL PRESSURE TRANSMITTER
ACCESSORIES




Line Mounted Purge for Differential Pressure Transmitter

ACCESSORIES

MANIFOLDS




3 Valve Manifold for the QVT-SV Differential Pressure Transmitter
For the QVT-SV Differential Pressure Transmitter, we offer a line of both 3-Valve and 5-Valve Manifolds that mount directly under the QVT Differential Pressure Transmitter.



LINE MOUNTED PURGE




Line Mounted Purge for Differential Pressure Transmitter
The Line Mounted Purge or LMP is a low-volume continuous purge that is used to purge either the pitots or the transmitter for particulate-laden air streams. When used to purge the transmitter, the LMP will deliver a continuous volume of air through the impulse lines, to ensure that no dust, particulate, or moisture can travel through the impulse lines and enter the transmitter.

QVT-SV: DIFFERENTIAL PRESSURE TRANSMITTER
TECHNICAL DOCUMENTATION






MANUALS


Below, you can find the manuals for the QVT family of flow transmitters. For any questions or technical issues that you may have, please contact us for assistance.


MANUALS




QVT Electronics Manual

I & O Manual - QVT Transmitter




APPROVALS AND CERTIFICATES


QVT-SV: DIFFERENTIAL PRESSURE TRANSMITTER



QVT High Performance Differential Pressure Transmitter for measuring the velocity pressure or Differential Pressure across any flow element within a duct

What is the QVT-SV?

The QVT-SV Differential Pressure Transmitter will measure the Differential Pressure (Velocity Pressure) within nearly any low pressure ductwork and will deliver either a Differential Pressure or un-compensated 4-20 mA mass flow signal. The QVT-SV can be used with Eastern Instruments brand flow elements or with any other manufacturer's brand of DP based flow elements. While the QVT-SV Differential Pressure Transmitter is perfect for any application under 9 in WC, it is especially accurate for draft range applications where the Differential Pressure can be under 1 in WC.

FEATURES AND BENEFITS
  • MODE OF OPERATION: Differential Pressure Transmitter that will output Differential Pressure or Flow (which is uncompensated for Absolute Pressure or Temperature) via a 4-20 mA signal
  • PROCESS SEAL: Our unique method of isolating sensors from the process requires no diaphragm seal, meaning that the QVT-SV can measure a much lower DP than traditional transmitters with diaphragm seals. Sensor Isolation can be further enhanced by using a Purge Seal (Low Volume Continuous Purge coupled directly to transmitter)
  • FLOW ACCURACY: Accuracy of measurement can be as high as +/-0.50% of reading over a 100:1 range in DP and a 10:1 range in flow
  • RANGEABILITY: Can be ranged from 0 to 0.1 in WC up to 0 to 8 in WC
  • RESPONSE TIME: Updates flow calculation 10 times a second
  • FUNCTIONALITY: All measured and calculated variables are available on LCD panel
  • OUTPUT: 4-20 mA output that can be set to Differential Pressure or Flow
  • SIMPLICITY: Ae and the 4-20 mA full scale value are set from the LCD/push button interface
  • ZERO: Differential Pressure can be zeroed from the LCD/push button interface
  • POWER SUPPLY: Loop Power 8.8 to 42.5 vDC range
  • VERSATILITY: LCD can be rotated independently of the head (LCD rotates 270o and the head can rotate 180o for ultimate adjust-ability)

QVT-SV: DIFFERENTIAL PRESSURE TRANSMITTER
APPLICATIONS




QVT-SV APPLICATIONS

The QVT Differential Pressure Transmitter can be used in a wide range of applications in a variety of sectors for accurate Differential Pressure based measurement. Whether coupled with an array of Eastern Instruments Insertion pitots or with another manufacturer's flow element, the QVT Differential Pressure Transmitter will accurately output either the DP or flow of air traveling through your duct work. Below are just a few applications.


PERFECT FOR NEW INSTALLATIONS




QVT Differential Pressure Transmitter coupled with an HBP flow conditioner for maximum flow accuracy
The QVT-SV is perfect for new installations and can easily be coupled with nearly any manufacturer's DP based flow element, including Eastern Instruments' own High Beta flow element, pictured here. Typically coupled with standard 3-Way or 5-Way Valves, the setup and installation of the QVT-SV is extremely simple.
  • COMMON QVT-SV APPLICATIONS

  • Combustion Air
  • Pneumatic Conveyance Systems
  • Industrial Drying Processes
  • Process Exhaust Systems
  • Scrubbers
  • Industrial Oven Vent Lines


QVT Cut Sheet | Air Flow Catalog


PERFECT FOR RETROFIT INSTALLATIONS




The QVT Differential Pressure Transmitter is easily retrofitted to any array of DP based flow elements for accurate air flow measurement of any process air flow
The QVT-SV Differential Pressure Transmitter is perfect for retrofit installations as well, especially since the QVT-SV will work with any new or existing DP based flow element, making the QVT-SV perfect for retrofit applications where a transmitter is needed for an existing element. The optional mounting bracket for the QVT-SV Differential Pressure Transmitter allows it to be pipe mounted in either the horizontal or vertical plane.
  • COMMON QVT-SV APPLICATIONS

  • Combustion Air
  • Pneumatic Conveyance Systems
  • Industrial Drying Processes
  • Process Exhaust Systems
  • Scrubbers
  • Industrial Oven Vent Lines




QVT Cut Sheet | Air Flow Catalog

QVT-SV: DIFFERENTIAL PRESSURE TRANSMITTER
SPECIFICATIONS




SPECIFICATIONS

We apologize, but the Specification Tables on this page of our website are unavailable for mobile viewing.

DIFFERENTIAL PRESSURE SENSOR ACCURACY

OPERATING
TEMPERATURE
HIGH ACCURACY
EXTREME ACCURACY
25° C
+/- 0.05% Reading and +/- 0.005% URL
at Operating Temperature of 25° C
0° C to 50° C
+/- 0.2% Reading and +/- 0.2% URL
at Operating Temperature of 0° C to 50° C
+/- 0.05% Reading and +/- 0.005% URL
at Operating Temperature of 0° C to 50° C
-20° C to 70° C
+/- 0.05% Reading and +/- 0.005% URL
at Operating Temperature of -20° C to 70° C
  • Operating Range: 10000:1 (0.0009 in WC to 9.0 in WC)
  • Rangeability:160:1 (0 to 0.05 in WC - 0 to 8.0 in WC) - 4-20 mA Full Scale Range
  • Position Effect: Less than 0.00375% URL in any plane


MASS FLOW COMPUTATION ACCURACY

OPERATING
TEMPERATURE
HIGH ACCURACY
EXTREME ACCURACY
25° C
+/- 0.50% Reading 100:1 dP (10:1 flow) Range
+/- 1.0% Reading 225:1 dP (15:1 flow)
0° C to 50° C
+/- 0.50% Reading 100:1 dP (10:1 flow) Range
+/- 1.0% Reading 225:1 dP (15:1 flow)
-20° C to 70° C
+/- 0.50% Reading 100:1 dP (10:1 flow) Range
+/- 1.0% Reading 225:1 dP (15:1 flow)



QVT-SV: DIFFERENTIAL PRESSURE TRANSMITTER
SALES LITERATURE





PRODUCT LITERATURE


Below, you will find a variety of product literature including product catalogs, single page cut sheets and various application guides that can assist in selecting the correct flow element for your project. If you have any questions, please feel free to contact us as well.


AIR FLOW PRODUCT CATALOGS




Air Flow Measurement Solutions Catalog - QVT-SV Differential Pressure Transmitter


SPEC SHEETS




QVT-SV Spec Sheet