Model 641B Air Velocity Transmitter, for Industrial, Size : Customised, Standard

Listing ID #5358702

model 641b air velocity transmitter

dirty air flow applications

a low-cost, direct reading instrument used for both air velocity & static pressure teststhe model 641b air velocity transmitter uses a heated mass flow sensor suitable for dirty air flow applications. It has user-selectable ranges from 250 fpm (1.25 mps) to 2000 fpm (10 mps).

product applications

exhaust stack flow monitoring

air control in drying processes

hvac air velocity measurements

fan supply and exhaust tracking

clean room ventilation monitoring

model description

641b-4air velocity transmitter.

641b-4-ledair velocity transmitter with led display.

specifications

service:air and compatible, non-combustible gases.

accuracy:5% fs process gas: 32 to 122°f (0 to 50°c); 6% fs process gas: -40 to 32°f & 122 to 212°f (-40 to 0°c & 50 to 100°c).

response time:flow: 1.5 s to 95% of final value (output filter set to min).

temperature limits:process: -40 to 176°f (-40 to 80°c). Ambient: 32 to 140°f (0 to 60°c).

humidity limit:non-condensing.

power requirements:12 to 35 vdc, 10 to 16 vac. 1.5 a rating required on supply due to initial power surge drawn by transmitter.

output signal:4 to 20 ma, isolated 24 v source, 3 or 4-wire connection.

output filter:selectable 0.5-15 s.

loop resistance:600 ω max.

current consumption:300 ma max*.

electrical connections:screw terminal.

enclosure rating:designed to meet nema 4x (ip66) for non-led models only.

mounting orientation:unit not position sensitive.

weight:12.6 oz (357.2 g).

*a brief current transient exceeding 300 ma may be seen on startup.

features

ss sensor suitable for dirty air flow measurement

ranges from 250 fpm (1.25 mps) to 2000 fpm (10 mps)

4 to 20 ma output

digital filter for signal damping

accessories

model numberdescription

a-155cable gland with 1/2" male npt fitting.

a-156flange mounting plate with 1/2" female npt.

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series 641 air velocity transmitter

series 641 air velocity transmitter

technical reference books

technical reference books

feature : excellent performance, fine finished, high quality

material : aluminum, plastic

warranty : 1yrs

output : 3 or 4-wire connection.

voltage : 10 to 16 vac. 1.5 a rating required on supply due to initial power surge drawn by tran

power : non-combustible gases.

type : air velocity transducer, model 641b air velocity transmitter

weight : 12.6 oz (357.2 g).

usage : non-combustible gases.

condition : new