Handheld Ultrasonic Heat meter

Clamp-on Handheld Ultrasonic heat meter(BTU meter)
  • Clamp-on Handheld Ultrasonic heat meter(BTU meter)

 

RBFM Handheld/Portable Clamp-on ultrasonic heat meters(BTU meters) employ the proven transit-time ultrasonic flow measurement technique combined with two PT 100 temperature sensors (or customer-supplied RTD sensors) for calculating total and instantaneous energy consumption. Flow measurement may be achieved via clamp-on, spool piece, or insertion-type sensors. Our microprocessor based, user friendly field programmable flow measurement technique creates no interruption of the process flow and allows for easy installation.  

RBFM ultrasonic heat meter is available with a variety of features that make it adaptable to many different applications. Available transducer types include clamp-on, in-line, and insertion. Wall-mount, panel-mount, pipe-mounted and compact din-rail mounted display types are also offered. Additional available features include pulse, 0-20mA & 4-20mA outputs, RS-485communication, user-select-able engineering units, and a data logger function. This variety of features, combined with its low cost, make the RB series an ideal choice for economical BTU monitoring in many applications involving chillers, radiators, and heat exchanges.

Description

  • Principle
  • Features
  • Specification
  • Model Selection
  • Applicants
  • Download
Principle

Measuring principle of Transit-time Ultrasonic Heat Flowmeters

RBFM Series Clamp-on  transit time flow meter utilizes two transducers that function as both ultrasonic transmitters and receivers. The transducers are clamped on the outside of a closed pipe at a specific distance from each other. The transducers can be mounted in V-method in which case the ultra sound transverses the pipe twice, or W-method in which case the ultra sound transverses the pipe four times, or in Z-method in which case the transducers are mounted on opposite sides of the pipe and the ultra sound transverses the pipe only once. The selection of mounting method depends on pipe and liquid characteristics. When the flow meter works, the two transducers transmits and receives ultrasonic signals amplified by multi beam which travels firstly downstream and then upstream (Figure 1). Because  ultra sound travels faster downstream than upstream, there will be a difference of time of flight(△ｔ). When the flow is still, the time difference(△ｔ) is zero. Therefore, as long as we know the time of flight both downstream and upstream, we can work out the time difference, and then the flow velocity (V) and flow volume (Q) via the following formula.

 

V= K*D* △ｔ               

V: Liquid velocity

K: Constant

D: Distance between the two transducers

△ｔ: Difference in time of flight

Features

RBFM Handheld/Portable Clamp-on ultrasonic heat meters (BTU meters) Features

  • Measures energy consumption rate and total
  • No moving parts
  • Hand-held and Portable version
  • Proven ultrasonic technology for flow measurement and PT 100 for temperature
  • Clamp-on, spool piece or insertion mounting for flow measurement
  • Wide range of fluid velocities - 0.03 ~ ± 105 feet/sec.
  • Transducers for pipe sizes ranging from ½" to 240" (15 to 6000 mm);
  • High accuracy - ±1% of reading
  • RS485 and Modbus communication protocols available
  • 4-20mA and pulse outputs with available relays and alarms
  • Data logger function - includes time & date, totalizer, diagnostics
  • Fast response time - less than 1 second
  • Opertion time is more than 15 hours
  • NIST traceable calibration certification (for optional)
Specification

RBFM Handheld/Portable Clamp-on ultrasonic heat meters(BTU meters) Specification:

Transmitter

Power Supply

3 AAA Ni-H built-in batteries. When fully recharged it will last over 12 hours of operation. 90-240VAC for the charger

Velocity

0 ~ ±40 ft/s (0 ~±12m/s), bi-directional

Display

2 line×10 English letters LCD back lit, can display total flow, flow rate, velocity and meter running status etc. 

Units

Rate

Totalized

User Configured (English and Metric);

Rate and Velocity Display;

(FWD, NET, REV or BATCH) gallons, ft³, barrels, lbs, liters, m³,kg

Output

4-20mA; Pulse, Relay, RS485, options: up to 64 GB Data logger

Input

3* 4-20mA

2*Pt100 3 wires can measure Heat

Accuracy

±1.0%~2.0% of reading at rates >0.5 m/s

±2.0% of reading at rates <0.5 m/s

Sensitivity

Flow Rate: 0.001ft/s (0.0003m/s)

Repeatability

0.2% of reading

Security

Keypad lockout, access code enable

Dimensions and Weight

100×204×34  Weight: <0.6kg

Transducer

Liquid Types Supported

Virtually most any liquid containing less than 2% total suspended solids (TSS) or aeration

Suited Liquid Temperature

Std. Temp. Transducer: -40℃~160℃

 

Dimensions and Weight

S: Size:42×25×25; weight:<0.3kg

M: Size:60×43×43; weight:<0.6kg

L: Size:80×53×53; weight:<1.0kg

Temperature Sensor

Pt100

Pipe Size

Transducer without Frame

SN

MN

LN

S transducer: DN15-100

Std M transducer: DN50-700

L transducer: DN300-6000

Transducer with Frame

SPMN

MPMN

S transducer: DN15-100

Std M transducer: DN50-300

Data Logger

Optional
Model Selection

RBFM Ultrasonic Flow/Heat Meter Model Selection

RBFM 

X

 

X

X

DNxx

X

X

 

X

X

X

 

 

Instrument Type

 

  

F

Ultrasonic Flowmeter

H

Ultrasonic Heat meter

 

Power supply

A

220VAC

D

24VDC

B

Battery

 

Flow/Heat meter Type

  

F

Fixed type

H

Handheld type

F

Flanged type

B

Battery type

 

  

  

  

Transducer Type

  

 

SN

S type(pipe size: 15-100mm, temp.: -30 to 90℃)

SH

S type(pipe size: 15-100mm, temp.: -40 to 160℃)

SPMN

S type with mounting frame only for Handheld (pipe size: 15-100mm, temp.: -40 to 90℃)

SPMH

S type with mounting frame only for Handheld(pipe size: 15-100mm, temp.: -40 to 160℃)

MN

M Type(pipe size: 50-700mm, temp.: -30 to 90℃))

MH

M Type(pipe size: 50-700mm, temp.: -40 to 160℃))

MPMN

M type with mounting frame only for  Handheld (pipe size: 50-300mm, temp.: -40 to 90℃)

MPMH

M type with mounting frame only for Handheld (pipe size: 50-300mm, temp.: -40 to 160℃)

RB-1

extended the mounting frame, for pipe:DN300-700mm, temp.: -40 to 90℃

RBH

extended the mounting frame, for pipe:DN300-700mm, temp.: -40 to 90℃

LN

L type(pipe size: 300-6000mm, temp.: -30 to 90℃)

LH

L type(pipe size: 300-6000mm, temp.: -40 to 160℃)

I

Insertion Type

IE

Extended type

F

Flanged type

 

Pt100

Temperature sensor

  

 

DNxx

Pipe size

  

 

 

Pipe material

  

 

C

Carbon Steel

SS

Stainless Steel

CI

cast iron

F

Fibreglass

P

PVC

C

cement pipe

X

Others,  clarify

 

X

Pressure(MPa)

  

 

Output

  

N

NO

A

4-20mA

P

Pulse

R

Relay

2

RS232

4

RS485

5

Datalogger

 

Input

 

N

NO

1

1*4-20mA

2

2*4-20mA

3

3*4-20mA

 

Cable length

X

meter
Applicants

Handheld Clamp-on Ultrasonic Heat meter(BTU meter) Applicants

  • HVAC/Energy Monitoring
  • Energy consumption supervision and water conservation management
  • Cooling system and air conditioning/glycol solutions
  • Building Automation / HVAC
  • Heating & District Heating Solutions & Systems
  • Thermal energy measurement (heating and conditioning) and water metering (cold and worm)
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