Gefran SERIE KE Data Sheet

NaK FILLED MELT PRESSURE
TRANSMITTERS
SERIE KE 4...20mA output

The KE Series are for use in high temperature applica­tions where the process temperatures may reach 538°C
(1000°F) such as high temperature engineered polymers.
The K Series utilizes standard melt pressure principles
and construction, but uses a near incompressible NAK
(Sodium Potassium) for pressure transmission.
The K Series strain sensing technology is bonded foil
strain gage.

MAIN FEATURES

• Pressure ranges from:
0-35 to 0-1000 bar / 0-500 to 0-15000 psi

• Accuracy: < ±0.25% FSO (H); < ±0.5% FSO (M)

• Hydraulic transmission system for pressure signal guarantees
stability at working temperature (NaK).

Liquid conforming to RoHS Directive.
NaK is defined as a safe substance (GRAS)

• Quantity of NaK contained per model: KE0 series (30mm³)

[0.00183 in³], KE1, KE2, KE3 (40mm³) [0.00244 in³]

• 1/2-20UNF, M18x1.5 standard threads; other types available
on request

• Autozero function on board / external option

• Stem drift Autocompensation function (SP version)

• Inconel 718 diaphragm with GTP+ coating for temperatures
up to 538°C (1000°F)

• 15-5 PH diaphragm with GTP+ coating for temperatures up
to 400°C (750°F)

• Hastelloy C276 diaphragm for temperatures up to 300°C

(570°F)

• 17-7 PH corrugated diaphragm with GTP+ coating for ranges
below 100bar-1500psi up to 400°C (750°F)

• Stem material: 17-4 PH

GTP+ (advanced protection)
Coating with high resistance against corrosion, abrasion and
high temperature

AUTOZERO FUNCTION

All signal variations in the absence of pressure can be elimina­ted by using the Autozero function.
This function is activated by closing a magnetic contact located
on the transmitter housing.
The procedure is permitted only with pressure at zero.

AUTO-COMPENSATED INFLUENCE OF MELT
TEMPERATURE

Thanks to internal self-compensation, the KSP series transmit­ter cancels the effect of pressure signal variation caused by
variation of Melt temperature.
This reduces at the minimum the read error caused by heating
of the filling fluid (typical of all sensors built with “filled” techno­logy).
The drift values declared in the version with Autocompensation
are valid for media temperatures up to 500°C.

TECHNICAL SPECIFICATIONS

Accuracy (1)

Resolution

Measurement range

Maximum overpressure
(without degrading performances)

Measurement principle Extensimetric

Power supply

Maximum current absorption

Insulation resistance

(at 50Vdc)

Output signal Full Scale FSO 20mA

Zero balance
(tolerance ± 0.25% FSO)

Zero signals adjustment
(tolerance ± 0.25% FSO)

Span adjustment within ± 5% FSO

Maximum allowed load See chart

Electronic response time

(10...90% FSO)

Output noise (RMS 10-400Hz) < 0.025% FSO

Calibration signal

Output short circuit and reverse
polarity protection

Compensated temperature range 0...+85°C

Operating temperature range

Storage temperature range

Thermal drift in compesated range:
Zero / Calibration / Sensibility

Diaphragm maximum temperature

Zero drift (zero)

Zero drift temperature for
Autocompensated version (SP)
within the temperature range
20°C-500°C inclusive the drift tem­perature of the housing

Thermocouple (model KE2)

Protection degree
(with 6-pole female connector)

FSO = Full Scale Output
(1) BFSL method (Best Fit Straight Line): includes combined effects of Non­Linearity, Hysteresis and Repeatability.

H <±0.25%FSO (100...1000 bar)

M <±0.5%FSO (35...1000 bar)

Infinite

0..35 a 0..1000bar

0..500 a 0..15000psi

2 x FSO

1.5 x FSO over 700bar/10000psi

10..30Vdc

32mA

>1000 MOhm

4mA

“Autozero” function

See Melt Manual

~ 1ms

80% FSO

YES

-30...+105°C

-40...+125°C

< 0.02% FSO/°C

538°C

1000°F

< 3,5bar/100°C /

< 28 psi/100°F

< 0.005 bar/°C 100 ≤ p < 500 bar

0.0022 %FS/°C p ≥ 500 bar

STD : tipo “J”

(isolated junction)

IP65

MECHANICAL DIMENSIONS

KE0

D1

D2

D3

D4

D5

A

B

C

KE2

1/2 - 20UNF

ø7.8 -0.05

[ ø0.31” -0.002 ]

ø10.5 -0.025

[ ø0.41” -0.001 ]

ø10.67

[ ø0.42” ]

ø12.7

[ ø0.5” ]

5.56 -0.26

[ 0.22” -0.01 ]

11.2

[ 0.44” ]

15.74

[ 0.62” ]

Ch

[Hex]

16

[ 5/8” ]

KE1 KE3

D1

M18x1.5

[ ø0.394” -0.002 ]

[ ø0.63” -0.003 ]

[ ø0.63” -0.016 ]

A

[ 0.24” -0.01 ]

B

[ 0.58” -0.016 ]

C

ø10 -0.05

ø16 -0.08

ø16 -0.4

ø18

[ ø0.71” ]

6 -0.26

14.8 -0.4

19

[ 0.75” ]

19

[ 3/4” ]

D2

D3

D4

D5

Ch

[Hex]

Exposed capillary

D1 1/2-20UNF

.307/.305”

D2

[7.80/7.75mm]

.414/.412”

D3

[10.52/10.46mm]

.125/.120”

A

[3.18/3.05mm]

.318/.312”

B

[8.08/7.92mm]

C

.81”

[20.6mm]

NOTE : dimensions refer to rigid stem length option “4” (153 mm – 6”)

WARNING : For installation use a maximum tightening torque of 56 Nm( (500 in-lb)

42 [1.65"]

ELECTRICAL CONNECTIONS

CURRENT OUTPUT (4...20mA, 2 wires)

CONTROLLER

AMPL./CONV.

LOAD RESISTANCE Rl

POWER SUPPLY VOLTAGE

Supply
(10...30Vdc)

Signal

(4...20mA)

Calibration shunt

MAGNETIC
AUTOZERO

6-pin 8-pin

+

n.c.

n.c.

A

C

-

B

D

E - F

n.c.

Connect the cable sheathing

to the side of the instrument

6-pin connector

VPT07RA10-6PT2

(PT02A-10-6P)

8-pin connector

PC02E-12-8P Bendix

B

A

D

C

E - F

G - H

Supply
(10...30Vdc)

Signal

(4...20mA)

Autozero

AUTOZERO FUNCTIONLOAD DIAGRAM

EXTERNAL

AUTOZERO

6-pin 8-pin

+

n.c.

n.c.

A

C

-

B

D

E - F

n.c.

The Autozero function is
activated through a
magnetic contact (exter­nal magnet
supplied with the sensor).
See the manual for a
complete Autozero fun­ction explanation.

B

A

D

C

E - F

G - H

The diagram shows the optimum ratio between load and
power supply for transmitters with 4…20mA output.
For correct function, use a combination of load resistan­ce and voltage that falls within the shaded area.

ACCESSORIES

Connectors

6-pin female connector (IP65 protection degree) CON300
8-pin female connector CON307

Extension cables

6-pin connector with 8m (25 ft) cable C08WLS
6-pin connector with 15m(50 ft) cable C15WLS
6-pin connector with 25m (75 ft) cable C25WLS
6-pin connector with 30m (100 ft) cable C30WLS
8-pin connector with 8m (25 ft) cable E08WLS
8-pin connector with 15m (50 ft) cable E15WLS
8-pin connector with 25m (75 ft) cable E25WLS
8-pin connector with 30m (100 ft) cable E30WLS
Other lengths on request

Accessories

Mounting bracket SF18
Dummy plug for 1/2-20 UNF SC12
Dummy plug for M18x1,5 SC18
Drill kit for 1/2 -20 UNF KF12
Drill kit for M18 x 1,5 KF18
Cleaning kit for 1/2-20 UNF CT12
Cleaning kit for M18x1,5 CT18
Fixing pen clip PKIT309
Autozero pen PKIT312
Thermocouple for KE2 model Type “J”

Type “J” (153mm - 6” rigid stem)

TTER 601

Cable color code

6 wires

Conn. Wire

A Red

Black

B

C White

D Green

E Blue

F Orange

Codice colore

cavo 8 wires

Conn. Wire

A White

B Red

C Green

D Black

E Blue

F Orange

G n.c.

H n.c.

ORDER CODE

Autocompensation (*) SP

Standard -

(*) available for ranges > to 100bar
(*) not available for version KE3

OUTPUT SIGNAL

4...20 mA E

VERSION

Rigid stem 0

Rigid + flexible stem 1

With thermocouple 2

Exposed capillary 3

CONNECTOR

Standard

6 pin 6

8 pin 8

ACCURACY CLASS

(ranges ≥100 bar/1500 psi)

0.25% FSO
H

0.5% FSO M

RANGE

bar (*) psi (*)

35 B35U 500 P05C

50 B05D 750 P75D

70 B07D 1000 P01M

100 B01C 1500 P15C

200 B02C 3000 P03M

350 B35D 5000 P05M

500 B05C 7500 P75C

700 B07C 10000 P10M

1000 B01M 15000 P15M

(*) Hastelloy diaphragm not avai-

lable for pressure range ≤ 70 bar

(1000 psi)

THREAD

Standard

1/2 - 20 UNF 1

M18 x 1.5 4

K

000

000= Standard version
Special or customized versions
available on request

E External autozero

- Magnetic autozero

CONTACT DIAPHRAGM

INCONEL 718 (538°C*)

I

S 15-5 PH (400°C*)

HASTELLOY C276

H

(300°C*)

(*) max temperature

FLEXIBLE STEM LENGTH (*)

(mm / inches)

Standard (KE0)

0 none

Standard (KE1, KE2)

D 457mm 18”
E 610mm 24”

F 760mm 30”

Standard (K33)

L 711mm 28”

Available on request

A 76mm 3”
B 152mm 6”
C 300mm 12”

RIGID STEM LENGTH (*) (mm

/ inches)

Standard (KE0, KE1, KE2)

4 153mm 6”
5 318mm 12.5”

Standard (KE3)

0 none

Available on request

1 38mm 1.5”
2 50mm 2”
3 76mm 3”
6 350mm 14”
7 400mm 16”
8 456mm 18”

(*) max combined rigid/flexible stem
length is 1000mm - 39”

Examples

KE2-6-M-B07C-1-4-D-I-000

Melt pressure transducer with type “J” thermocouple,4...20mA output, 6-pin connector, 1/2-20UNF thread, 00 bar pressure range, 0.5% accura­cy class, 153 mm (6”) rigid stem, 457mm (18”) flexible stem, Inconel 718 diaphragm.

KSPE0-6-M-P03M-1-4-0-I-000

Melt pressure transducer autocompensated version, rigid stem,

4...20mA output, 6-pin connector, f/2-20UNF thread, 3000 psi pressure range, 0.5% accuracy class, 153 mm (6”) rigid stem, Inconel 718
diaphragm.
Sensors are manufactured in compliance with:

- EMC

compatibility directive

- RoHS directive

GEFRAN spa reserves the right to make any kind of design or functional modification at any moment without prior notice

DTS_KE_11-2016_ENG