Gefran » Sensors » Melt Pressure Sensors » Sodium-potassium (NaK) filled (K Series)

KD NaK filled Melt pressure transmitters

Available Configuration

OUTPUT SIGNAL
VERSION
CONNECTOR
ACCURACY CLASS
RANGE
THREAD
RIGID STEM LENGTH (mm / inches) (*)
FLEXIBLE STEM LENGTH (mm / inches) (*)
CONTACT DIAPHRAGM
Standard version

Description

The K3 Series consists of pressure sensors for high-temperature applications where process temperatures can reach 538°C (1000°F), such as high-temperature engineered polymers. The K Series uses standard melt pressure principles and construction, with bonded foil strain gauge technology for strain measurement. Pressure transmission is carried out using near-incompressible NaK (Sodium Potassium), which is FDA-recognized as a safe (GRAS) substance.

Application:

  • FDA-approved: suitable for mercury-free, food, and medical applications.
  • Processing special polymers and technopolymers at temperatures up to 538°C (1000°F).
  • Electrical
  • Digital output signal with DP404 CAN OPEN communication protocol.
  • Transmission frequency (Baud rate): 10 Kbaud to 1 Mbaud (default 500 Kbaud).
  • Software/Hardware selection of Baud rate and ID nodes.
  • Operation with one or two programmable alarm limits.
  • "Autozero" function for temperature compensation.
  • Zero and span drift compensation.
  • 80% FSO calibration signal.
  • Mechanical
  • Pressure ranges: 0–35 to 0–700 bar / 0–500 to 0–10000 psi.
  • Accuracy: < ±0.25% FSO (High); < ±0.5% FSO (Medium).
  • Hydraulic transmission system ensures temperature stability using NaK. The liquid is RoHS-compliant and GRAS certified.
  • NaK volume per model: KD0 series (30 mm3) (0.00183 in3), KD1/KD2/KD3 series (40 mm3) (0.00244 in3).
  • Standard threading: 1/2-20 UNF, M18x1.5; other versions 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 100 bar / 1500 psi.

 
Data Sheet