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➀ Consult factory for higher temperatures on remote mounted transmitter

ELECTRICAL

SPECIFICATIONS

Supply Voltage

24 VDC, (14–40 VDC)

120/240 VAC, 50–60 Hz, (+10/-15%)

Current

38 mA maximum

Line Variation

Less than ±.10%/volt, for voltages between 14–40 VDC

Ambient Temperature

-40° to +160° F (-40 to +70° C)

Zero Range

1000 pF (max.), 0 pF (min.)

Span Range

4000 pF (max.), 50 pF (min.)

Output Linearity

50–500 pF ±1% of span

501–1500 pF ±2% of span

1501–4000 pF ±1% of span

Response Time

Less than 0.1 second

Repeatability

±0.25%

Temperature Coefficient of Output

4000 pF span: Less than 0.035%/° F (0.063%/° C)

-40° to +160° F (-40° to +70° C)

1000 pF span: Less than 0.025%/° F (0.045%/° C)

50 pF span: Less than 0.075%/° F (0.135%/° C)

➀

TECHNOLOGY

The amount of capacitance developed in any vessel is

determined by the size (surface area) of the probe, the

distance from the probe to its ground reference (e.g. tank

wall), and the dielectric of the medium being measured.

If the probe’s mounting position is fixed and the dielectric

value of the medium is constant, then the amount of

capacitance developed becomes dependent on the media

in contact with the probe.

As media rises and falls in the tank, the amount of capaci-

tance developed between the sensing probe and the

ground also rises and falls. This change in capacitance is

converted into a proportional 4–20 mA output signal.