Siemens 7ML1301-1, Instruction Manual, Page: 20 / 99

Page 16 SITRANS LG200 – INSTRUCTION MANUAL 7ML19985KA02
Specificat
ions
Twin Rod Probe
(7ML1302-1) Flexible Twin Rod Probe
(7ML1302-3) Flexible Twin Rod Bulk Solids
Probe (7ML1302-2)
Model reference
number 7xB-x 7x7-x 7x5-x
Recommended
applications: General purpose,
foam, minor film
coating Low dielectric media (1.9 to 10)
with lengths > 6 m (20 ft) Granular light bulk solids
applications (powders, grains,
dust), 3000 lbs pull-down force
Not recommended for: Media bridging
between rods or
building up on spacers
Dielectric > 10: media bridging
on flexible elements Media bridging flexible elements
Materials/wetted
parts 316L SS, TFE spacers,
O-ring
1
1.
See O-ring Selection Guide for guidance
316L SS, FEP webbing, O-ring
1
316L SS, FEP webbing, O-ring
1
Process seal O-ring
1
O-ring
1
Sealant
Rod/tube diameter Two, ø 12 mm (0.5”)
rod; 22 mm (0.875”) C
L
to C
L
Two, ø 6 mm (0.25”) cables;
22 mm (0.875”) C
L
to C
L
Two, ø 6 mm (0.25”) cables; 22 mm
(0.875”) C
L
to C
L
Process connection
thread 2” NPT [(Taper), ANSI/
ASME B1.20.1],
G 2” [(BSPP), EN ISO
228-1] 2” NPT [(Taper), ANSI/ASME
B1.20.1], G 2” [(BSPP), EN ISO
228-1] 2” NPT [(Taper), ANSI/ASME
B1.20.1], G 2” [(BSPP), EN ISO 228-
1]
Flange ASME (EN/
DIN) 2 to 4” (DN 50 to 100) 2 to 4” (DN 50 to 100) 2 to 4” (DN 50 to 100)
Length 60 to 610 cm (24 to
240”) 1 to 22.5 m (3 to 75 ft) 1 to 22.5 m (3 to 75 ft)
Transition zone
2
:
Top
2.
Transition zone is dielectric dependent: dK = dielectric permittivity. Unit will function but
accuracy will decrease in Transition Zone
150 mm (6”) @ dK > 1.9
Blocking distance:
none
150 mm (6”) @ dK > 1.9
Blocking distance: 12 to 50 cm
(4.8 to 20”)
150 mm (6”) @ dK > 1.9
Blocking distance: 12 to 50 cm (4.8
to 20”)
Transition zone:
Bottom
150 mm (6”) @ dK = 1.9
25 mm (1”) @ dK = 80
305 mm (12”) 305 mm (12”)
Process temperature
max.
3
3.
Refer to Ambient Temperature vs Process Temperature graphs or instruction manual
+200 °C @ 19 bar g (+400 °F @ 275 psi g) +66 °C @ 3.4 bar g
(+ 150 °F @ 50 psi g)
Process temperature
min. -40 °C @ 70 bar g (-40 °F @ 1000 psi g) -40 °C @ 3.4 bar g (-40 °F @
50 psi g)
Process pressure
max. 70 bar g @ +20 °C (1000 psi g @ +70 °F) 3.4 bar g @ +66 °C (50 psi g @
+ 150 °F)
Process pressure
min./vacuum service Yes, not hermetic Not suitable
Dielectric range 1.9 to 100 1.9 to 100 1.9 to 100
Maximum viscosity
(cP) 1500 1500 Not suitable
Coating/buildup Yes, maximum error 3% of coated length with conductive media
Bridging not recommended.
4
4.
Bridging is defined as continuous accumulation of material between the probe elements
Foam Yes Yes Yes
Corrosives Yes No Yes
Sanitary No No No
Overfill No No No