VOLU-probe/SS

Product Type: Insertion Flow Measuring Probe
Technology Type: Differential Pressure Pitot Airflow Traverse Probe

Get high accuracy flow measuring probes engineered for your challenging process conditions.

The VOLU-probe/SS Stainless Steel Airflow Traverse Probe is ideal for clean or dirty applications with corrosive, abrasive, and extreme temperatures. It consists of multiple Pitot total and static pressure sensing ports positioned along the length of each probe to traverse the duct cross-section.

Engineered solutions for ducts of any size
Intelligent design for simple installation in existing or new ductwork
Lower maintenance costs with reliable flow measurement

VOLU-probe SS – Stainless Steel Traverse Probe with Transmitter

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Features and Benefits:

No Air Straighteners Required. The VOLU-probe/SS unique dual offset static pressure sensor and patented chamfered total pressure sensor design permit the accurate measurement of the airflow rate in highly turbulent flow locations (with directional yaw and pitch varying up to 30º from the duct’s longitudinal axis) without the need for upstream air straightening means when installed within required minimum upstream/downstream duct requirements.
Offered in Two Models. The VOLU-probe/SS is offered in two basic configurations to facilitate installation in new or existing ducts or stacks; the Model 1SS for external mounting, and the Model 2SS for internal mounting for rectangular ducts only.
Negligible Resistance to Airflow. The VOLU-probe/SS cylindrical configuration and smooth surface free of external sensor protrusions permit the airstream to flow unrestricted around and between the installed traverse probes, creating a very minimal, if not negligible resistance to airflow (Ex: 0.046 IN w.c. at 2000 fpm air velocity). The negligible resistance to airflow is of importance because it will not consume fan capacity or waste energy, compared to traditional devices like venturis, airfoils and orifices.
Performs Equal-Weighted Averaging of Flow Signals. Through the use of separate averaging manifolds, the VOLU-probe/SS instantaneously averages, on an equal-weighted basis, the multiple pressures sensed along the length of the probe, producing separate “averaged” total pressure and static pressures at the probe’s external signal connections.
Provides for Equal Area Traverse. Each VOLU-probe/SS contains multiple total and static pressure sensors specifically and precisely located along the length of the probe to provide an equal area traverse of ducted airflow. For rectangular duct configurations, the sensors are spaced at equal distances along the probe. For circular duct configurations, the sensors are located at the centers of the equivalent concentric area along the probe.
True Velocity Pressure Measurement. The total and static pressure components of airflow measured by the VOLU-probe/SS represent true average velocity pressure and can be directly converted to velocity without the use of correction factors.
Purgeable Design. Unique design permits high pressure, full volume purge for an effective cleaning to ensure accurate long-term measurement in dirty air applications.
Rugged Construction Assures Long Service Life. The standard VOLU-probe/SS is fabricated from Type 316 stainless steel using all welded construction. Contact Factory for alternate materials of construction such as Hastelloy, Inconel, Kynar, PVC, etc, and for special coatings such as Teflon and erosion resistant tungsten carbide.

SPECIFICATIONS

Configurations:	SS 1 4″ 150lb Flanges	SS 1 Industrial External	SS 1 w/ Temp. Sensor Externally Mounted	SS 1 w/ Temp -150lb Flanges	SS 2 Industrial Internally Mounted	RS 2″ 150lb Mounting Flange for ducts 4″ to 8″	RS w/Mounting plate (ducts 4-8″)	RS w/ Threaded Fitting (ducts 2-8″)
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STANDARD CONSTRUCTION
Probe	1/2″, 3/4″, or 1″ tube sensing manifolds, threaded end support, washer and nut, 4″-150 lb. R.F. mounting flange with handles, signal connection fittings, and identification tag, all fabricated of Type 316 stainless steel.	1/2″, 3/4″, or 1″ tube sensing manifolds, threaded end support, washer and nut, mounting plate, signal	1/2″, 3/4″ or 1″ tube sensing manifolds, threaded end support, washer and nut, mounting plate, signal connection fittings, and identification tag, all fabricated of Type 316 stainless steel.	1/2″, 3/4″, or 1″ tube sensing manifolds, threaded end support, washer and nut, 4″-150 lb. R.F.	1/2″, 3/4″ or 1″ tube sensing manifolds, mounting plates, signal connection fittings, and identification tag, all	3/8″ O.D. tube sensing manifolds, airflow barrier, identification tag, all fabricated of Type 316 Stainless Steel.	3/8″ O.D. tube sensing manifolds, 4″ x 4″ mounting plate, identification tag, all fabricated of Type 316	3/8″ O.D. tube sensing manifolds, mounting adapter, mounting fitting, identification tag, all fabricated of Type 316 Stainless Steel.
Mounting	External duct mounted. Threaded end support for probes greater than 18″ long.	External duct mounted. Threaded end support for probes greater than 18″ long.	External duct mounted. Threaded end support for probes greater than 18″ long.	External duct mounted. Threaded end support for probes greater than 18″ long.	Internal duct mounted. Dual end mounting plates.	2″ – 150LB raised face mounting flange, Type 316 Stainless Steel. Does not include mounting hardware	–	Fitting, 1″ Compression X 1″ (M)NPT, Type 316 Stainless Steel
Mounting Gasket	–	Neoprene.	Neoprene.	–	–	–	Neoprene, for continuous operation up to 200 °F.	–
Connection Fittings	1/2″ FPT stainless steel.	1/2″ FPT stainless steel.	1/2″ FPT stainless steel.	1/2″ FPT stainless steel.	1/4″ FPT stainless steel for sizes up to 24″. ½” FPT stainless for sizes > 24″.	1/4″ – 18 (F)NPT, Type 316 Stainless Steel	1/4″ – 18 (F)NPT, Type 316 Stainless Steel	1/4″ – 18 (F)NPT, Type 316 Stainless Steel
Operating Temperature	Continuous operation to 900ºF.	Continuous operation to 900ºF.	Continuous operation to 900ºF.	Continuous operation to 900ºF.	Continuous operation to 900ºF.	Continuous operation to 900ºF.	Continuous operation to 900ºF.	Continuous operation to 900ºF.
Operating Humidity	–	–	–	–	–	0 to 100% RH, condensing	0 to 100% RH, condensing	0 to 100% RH, condensing
Temperature Sensor	–	–	Stainless steel sheath.	Stainless steel sheath.	–	–	–	–
Temperature J-Box	–	–	NEMA 4 cast aluminum.	NEMA 4 cast aluminum.	–	–	–	–
Temperature Transmitter	–	–	2-wire, 4-20mA output.	2-wire, 4-20mA output.	–	–	–	–
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PERFORMANCE SPECIFICATIONS
Accuracy	2-3%; dependent upon quantity and placement of probes to achieve traverse of ducted airflow.	2-3%; dependent upon quantity and placement of probes to achieve traverse of ducted airflow.	2-3%; dependent upon quantity and placement of probes to achieve traverse of ducted airflow.	2-3%; dependent upon quantity and placement of probes to achieve traverse of ducted airflow.	2-3%; dependent upon quantity and placement of probes to achieve traverse of ducted airflow.	2-3%; with application of a single probe coefficient, over a 5:1 turndown.	2-3%; with application of a single probe coefficient, over a 5:1 turndown.	2-3%; with application of a single probe coefficient, over a 5:1 turndown
Outputs	Individually averaged signals of total and static pressure.	Individually averaged signals of total and static pressure.	Individually averaged signals of total and static pressure.	Individually averaged signals of total and static pressure.	Individually averaged signals of total and static pressure.	–	–	–
Operating Velocity	400-10,000 FPM.	400-10,000 FPM.	400-10,000 FPM.	400-10,000 FPM.	400-10,000 FPM.	400-10,000 FPM.	400-10,000 FPM.	400-10,000 FPM.
Directional Sensitivity	Not measurably affected by directional airflows and pitch and yaw angles up to 30º.	Not measurably affected by directional airflows and pitch and yaw angles up to 30º.	Not measurably affected by directional airflows and pitch and yaw angles up to 30º.	Not measurably affected by directional airflows and pitch and yaw angles up to 30º.	Not measurably affected by directional airflows and pitch and yaw angles up to 30º.	–	–	–
Traverse Pattern	On an equal area basis for rectangular probes. On an equal concentric area basis for circular probes.	On an equal area basis for rectangular probes. On an equal concentric area basis for circular probes.	On an equal area basis for rectangular probes. On an equal concentric area basis for circular probes.	On an equal area basis for rectangular probes. On an equal concentric area basis for circular probes.	On an equal area basis for rectangular probes. On an equal concentric area basis for circular probes.	–	–	–
Resistance	Less than 0.1 times the velocity pressure head at probe operating velocity.	Less than 0.1 times the velocity pressure head at probe operating velocity.	Less than 0.1 times the velocity pressure head at probe operating velocity.	Less than 0.1 times the velocity pressure head at probe operating velocity.	Less than 0.1 times the velocity pressure head at probe operating velocity.	–	–	–
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OPTIONAL CONSTRUCTION
Flange Standoff	4″ (standard) Other __	–	–	4″ (standard) Other __	–	–	–	–
Flange Orientation	–	–	–	–	–	1 – Up (default) 2 – Up	–	–
Bolt Hole Orientation	1 – Up 2 – Up	–	–	1 – Up 2 – Up (standard)	–	–	–	–
Connection Fittings	1/4″ Compression 1/2″ Compression	1/4″ Compression 1/2″ Compression	1/4″ Compression 1/2″ Compression	1/4″ Compression 1/2″ Compression	1/4″ Compression 1/2″ Compression	–	–	–
Signal Connection	Cleanout	Cleanout	Cleanout	Cleanout	–	–	–	–
Temperature Sensor	–	–	Single-point 100 ohm, platinum RTD. Single-point thermocouple. Multi-point thermocouple.	Single-point 100 ohm, platinum RTD. Single-point thermocouple. Multi-point thermocouple.	–	–	–	–
High Temperature Gaskets	–	Silicone; for continuous operation between 200ºF and 400ºF Fiber; for continuous operation between 400ºF and 900ºF	Silicone; for continuous operation between 200ºF and 400ºF Fiber; for continuous operation between 400ºF and 900ºF	–	–	–	Silicone; for continuous operation between 200ºF and 400ºF Ceramin Fiber; for continuous operation between 400ºF and 900ºF	–
Mounting Fitting	–	–	–	–	–	–	–	1″ Compression X 3/4″ (M)NPT, Type 316 Stainless Steel

Applications:

Combustion Airflow Processes:
- Power Boilers
- Combination / Biomass Boilers
- Recovery Boilers
- CFBs
- Fired Heaters
- Kilns (Lime, Ceramic, Cement)
- Digesters
- Thermal Oxidizers
Dirty Airflow processes:
- Pneumatic Conveyors
- Primary Air for Pulverized Coal
- Paper Drying
- CNCG & HVLC
- Dust Collection Systems
- Stack Flow Measurement
- Cement
- Quench Exhaust
- Paint Spray Booths
- Fluidized Bed Dryers / Coaters
- Rotary Drum Dryers / Coaters
Clean Airflow Processes:
- Clean Room Pressurization
- Quench Airflow
- Semiconductor
- LCD Glass
- Aeration to Digesters

Best in Class Value Proposition:

Industry leading accuracy for airflow measurement.
Shortest straight run requirements in the industry.
Non-uniform flow profile problem solved: highest density of sensing point + patented measurement technology = excellent airflow measurement accuracy.
Dirty applications are no problem with AUTO-purge III feature.
Excellent long-term stability, repeatability, and unmatched accuracy when used with Air Monitor’s family of flow computers featuring AUTO-zero circuitry.
Available field start up services.