Flow transmitter testo 6457 perspective forward

testo 6457 – flow transmitter 8 … 27 450 m³/h

Flow measurement - 8 ... 27 450 m³/h

  • Suitable for large pipe diameters DN 65 - 250
  • Direct compressed air measurement with simultaneous display of three measured values thanks to standard TFT display
  • The sensor can be removed under pressure

Delivery time: 5-10 working days

SKU: 0555 6457 Categories: , , ,

The testo 6457 flow transmitter is used for measuring, monitoring and logging compressed air consumption and is therefore the ideal measuring instrument for detecting leaks in compressed air systems, allocating costs based on consumption and performing peak load management.

The testo 6457 measures the standard air flow in the compressed air according to the calorimetric principle, which means that the measurement method is independent of the process pressure and does not cause any permanent pressure loss.

The testo 6457 flow transmitter has a patented quick coupling, which allows the sensor to be removed under pressure. This is a great advantage, especially in the case of larger nominal widths, as these often involve main lines that do not allow pressure relief for maintenance purposes.

Flexible: Suitable for large pipe diameters DN 65 – 250
Clear overview: Direct compressed air measurement with simultaneous display of three measured values thanks to the standard TFT display.
Quick release: the sensor can be removed under pressure
Three measurement parameters in one instrument: flow rate, totalizer and temperature.

See the data sheet under the Download tab for full technical data.

Included in delivery

testo 6457 flow transmitter

Airflow measurement/adjustment rangeSee the datasheet under the PDF tab above for full technical data.
Measurement rangeDN 65 (2 ½“): 130 ... 31 280 l/min; 0,6 ... 143 m/s;8 ... 1 877 m³/h
DN 80 (3“):183 ... 43 920 l/min; 0,6 ... 143 m/s;11 ... 2 635 m³/h
DN 100 (4“): 315 ... 75 550 l/min; 0,6 ... 143 m/s; 19 ... 4 533 m³/h
DN 125 (5“): 481 ... 115 400 l/min; 0,6 ... 143 m/s; 29 ... 6 923 m³/h
DN 150 (6“): 708 ... 169 800 l/min;0,6 ... 143 m/s;43 ... 10 190 m³/h
DN 200 (8“): 1 206 ... 289 200 l/min;0,6 ... 143 m/s;73 ... 17 350 m³/h
DN 250 (10“): 1 908 ... 457 600 l/min;0,6 ... 143 m/s;115 ... 27 450 m³/h
Temperature coefficient“±0.07% of measured value
Accuracy
(measuring range)		Class 151: ±(3.1% of mv. + 0.5% of final value); Class 344: ±(6% of mv. + 0.6% of final value);

air quality acc. ISO 8573-1:2010; at average temperature 23 °C
Repeat accuracy±1.5% of measured value
Max display0 ... 120% final
Resolution0,9 l/min

0,1 m/s

0,05 m³/h
Low Flow Shutdown LFCCan be set by user. Factory setting 0.13% of final v.
Measurement/adjustment area for totalizer
Measurement range0 ... 100 000 000 m³ | 0 ... 353 146 667,2 scf
Max display0 ... 100 000 000 m³ | 0 ... 353 146 667,2 scf
Temperature measurement/adjustment range
Measurement range-10 ... 60 °C/14 ... 140 °F
Max display-24 ... 74 °C/-11,2 ... 165,2 °F
Resolution0,2 °C / 0,5 °F
Scope of use
MediaCompressed air
Average temperature-10 ... 60 °C/14 ... 140 °F
Pressure loadmax. 16 bar (> DN200 14 bar)
Electrical data
Operating voltage18 ... 30 VDC (according to EN 50178 SELV/PELV)
Power consumption< 80 mA
Protection classIII
Protected against polarity reversalYes
Outputs testo 6457
Output signal1 analog; 1 pulse
Number of outputs2
Analog output current4 ... 20 mA (scalable)
Max. current load< 150mA
Pulse voltageVDC - 2V
Pulse duration0.002 ... 2 s (depending on pulse value)
Max. load500 Ω
Short circuit protectionYes
Temperature measurement
Accuracy± 0.5 K; (for media flow within the limits of the measurement range)
Reaction time
Response time0,1 s; (dAP = 0)
Temperature measurement
Response dynamicst09 = 0,5 s
Environmental conditions
Ambient temperature0 ... +60 °C
Storage temperature-20 ... +85 °C
Moisture Max. permissible relative humidity < 90%
Protection classIP 65; IP 67
Approvals / tests
EMFDIN EN 60947-5-9
Vibration resistanceDIN EN 68000-2-6 | 5 g (10 ... 2 000 Hz)
Mechanical data
Material in instrument housingPBT-GF 20, PC (APEC), PBT-PC-GF 30; PPS GF 40; FKM
Contact with the mediaMaterials: stainless steel or zinc-coated steel, FKM, PPS GF40, Al203 (ceramic), acrylate, glass-coated ceramic
The length of the measuring tubeDN 65: 124 mm
DN 80: 160 mm
DN 100: 160 mm
DN 125: 172 mm
DN 150: 180 mm
DN 200: 180 mm
DN 250: 196 mm
Pipe diameterDN 65 (2 1/2")
DN 80 (3“)
DN 100 (4“)
DN 125 (5“)
DN 150 (6“)
DN 200 (8“)
DN 250 (10“)
Weight testo 6456
(steel)		DN 65: 9,2 kg
DN 80: 11,3 kg
DN 100: 13,5 kg
DN 125: 21,3 kg
DN 150: 26,9 kg
DN 200: 37,3 kg
DN 250: 55,8 kg
Weight testo 6457

(stainless steel)		DN 65: 11,1 kg
DN 80: 13,2 kg
DN 100: 15,4 kg
DN 125: 23,2 kg
DN 150: 28,8 kg
DN 200: 39,2 kg
DN 250: 57,7 kg
Display / buttons
DisplayColor screen - 1.44'' | pixel resolution - 128 x 128
Commentsm.v. = measured value
endv. = full scale value
Measurement, display and adjustment ranges refer to standard volume flow according to DIN ISO 2533.
See the user manual for information on installation and operation.
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Datablad testo 6457
763 downloads1.90 MB

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