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128

Reference Manual

00809-0100-4811, Rev DA

Appendix A: Reference Data

January 2015

Reference Data

Figure A-13. Lower Transition Zone

For a flexible single lead probe with chuck, the lower transition zone is measured upwards from

the upper part of the clamp.

Measuring range and minimum dielectric constant

16 in. (0.4 m) to 77 ft. (23.5 m)

See Table A-4 for each probe’s measuring range and minimum dielectric constant. Due to the

measuring range depending on the application and factors described below, the values are

guidelines for clean liquids. For more information, ask your local Emerson Process Management

representative.

Table A-4. Measuring Range and Minimum Dielectric Constant

Rigid single lead /

segmented rigid

single lead

Flexible single

lead

Coaxial Rigid

twin lead

Flexible

twin lead

Maximum

measuring

range

9 ft 10 in. (3 m)

for 8 mm probes (code 4A)

19 ft 8 in. (6 m)

for 13 mm probes (code 4B, 4S)

77 ft 1 in.

(23.5 m)

19 ft 8 in.

(6 m)

9 ft 10 in.

(3 m)

77 ft 1 in.

(23.5 m)

Minimum

dielectric

constant

2.5 (or 1.7 if installed in a

metallic bypass or

stilling well)

(1)

(1) May be lower depending on installation.

2.5 up to 36 ft

(11 m)

(2)

5.0 up to 66 ft

(20 m)

7.5 up to 77 ft 1 in.

(23.5 m)

(2) In pipes with a diameter less than 8 in. (20 cm), the minimum dielectric constant is 2.0.

1.5 1.9

1.6 up to 33 ft

(10 m)

2.0 up to 66 ft

(20 m)

2.4 up to 77 ft 1 in.

(23.5 m)

1 2 ... 133 134 135 136 137 138 139 140 141 142 143 ... 223 224

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