Gefran K3 SERIES Specification Sheet

NaK FILLED MELT PRESSURE TRANDUCERS

K3 SERIES mV/V output

The K3 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 guaran­ tees stability at working temperature (NaK).
Liquid conforming to RoHS Directive.
NaK is defined as a safe substance (GRAS

• Quantity of NaK contained per model:
K30 series (30mm³) [0.00183 in³], K31-K32-K33 series
(40mm³) [0.00244 in³]

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

• 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

TECHNICAL SPECIFICATIONS

Accuracy (1)

Resolution Infinite

Measurement range

Maximum overpressure

Measurement principle Strain gauge
Power supply 6..12Vdc (10Vdc typical)

Bridge resistance

Insulation resistance
(at 50Vdc)

Output signal Full Scale FSO
(tolerance ± 0;5% FSO)

Zero balance ±5%
Calibration signal 80% FSO
Compensated temperature

range

Maximum temperature range

Thermal drift in compesated
range: Zero / Calibration /
Sensibility

Diaphragm maximum
temperature

Zero drift due to change in
process temperature)

Thermocouple (model K32)

Protection degree
(with 6-pole female connector)

Electrical connections

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)

0..35 a 0..1000bar

0..500 a 0..15000psi
2 x FSO

1.5 x FSO over 700bar/10000psi

350 Ohm

(550 Ohm below

100bar - 1500psi)

>1000 MOhm

2.5 mV/V (option 2)

3.33 mV/V (option 3)

0...+100°C

32...212°F

-30...+120°C

-22...250°F

< 0.02% FSO/°C

< 0.01% FSO/°F

538°C

1000°F

< 3,5 bar/100°C

< 28 psi/100°F

STD : type “J”

(isolated junction)

IP65

Conn. 6-pin VPT07RA10-6PT

(PT02A-10-6P)

Conn.8-pin PC02E-12-8P