GEMU C32 Hydra-Dry is an electronic pressure measurement device equipped with a ceramic capacitive sensor. The sensor is isolated from the process by the double diaphragm system. The body is made from PFA and can be directly integrated into the pipe system by common flare unions. Only the PFA body and the PFA diaphragm are wetted parts. The pressure is transmitted by a ceramic sensor. No pressure transmission fluid is required.

  • C32 is especially suitable for pressure measurement of ultra high purity chemicals
  • All wetted parts are made from High Purity PFA
  • The pressure is transmitted by a ceramic sensor
  • The sensor is isolated from the process by a double diaphragm system
  • Minimal dead leg
  • No transmission fluid, "dry solution"
  • Non-metallic ultra pure ceramic sensor
  • Vented double diaphragm isolates the sensor
  • All plastic housing
  • No additional auxiliary power required
  • 5 different units of pressure can be set


Type C32
Nominal Size 1 1/4" DN 25 1" DN 20 1/2" DN 10 1/4" DN 4 1/4" NPT DN 4 3/4" DN 15 3/8" DN 6
Mounting Variant Dead-End In-Line NPT female thread NPT male thread
Connection Flare connection with PFA union nut Flare connection with PVDF union nut NPT female thread NPT male thread
Body Material PFA
Diaphragm Material PFA
Units Bar kPa psi
Measuring Range 0...100 psi, 0...600 kPa, 0...6.0 bar 0...30 psi, 0...250 kPa, 0...2.5 bar 0...60 psi, 0...400 kPa, 0...4.0 bar
Electrical Connection Cable outlet 5 m, IP 67 (FEP jacketed)
Display Integrated digital display Separate digital display Without
Transmitter Version High Purity, White


Version of Transmitter Diaphragm Double diaphragm system, vented
Material of Wetted Parts PFA
Flow Medium Suitable for any inert or corrosive gases or liquids, - particularly high purity media - which do not corrode the body and diaphragm materials.
Flow Direction Optional
Ambient Temperature 0 to +60 ºC
Medium Temperature 0 to +80 ºC
Storage Temperature -20 to +60 ºC

Pressure Transmitter

Auxiliary Power DC 16...30V
Input Signal 4...20 mA, two wire (supply from current loop, 6 V voltage loss)
Output Signal Analogue signal is directly looped through
Cable Length 5 m, flying lead, FEP jacketed
Characteristic Deviation ±0.5% of span
Max. Admissible Current ±40 mA (momentary)

Adjustment of Scaling

N/A Menu guided programming by external operating keys
Measuring range adjustable
Decimal point freely selectable
Programmable pressure units: bar, psi, kg/cm2, Mpa, kPa
Zero point freely adjustable within ±10% of span

Switching Output

N/A Can be individually adjusted by external operating keys
Number: 2 x NPN Open collector galvanically separated
Function: Make contact, break contact
Adjustment: Freely adjustable within 1... 99 % of span
Temperature error: < 0.1 % 110 K
Accuracy: ≤ ± 0.5 ± 1 digit (%of span)
Max. switching current: 300 mA (real)
Indication of switching status: LED