Huba Differential pressure transmitter 698

The pressure modules type 698 are suitable for monitoring pressure and flow in air conditioning systems and in the laboratory sector. 
The module is optionally available with a 3 digit LED display, two limit value switches (potential-free) as well as a square root extraction.

 Rugged measured value detector,  
 owing to outstanding synergy obtained 
 by combining diaphragm technology 
 with a cermaic element High overpressure safety margin, even in 
 the lowest pressure range Easy to install and commission No maintenance required

Technical overview
Pressure range
     -1 ... 0 bar
Relative
      0 ... 10 bar
     -5 ... 5 mbar
Differential
      0 ... 500 mbar
Operating conditions
Medium      Air and neutral gases
    Medium    0 ... +70 ¨¤
Temperature    Ambient -10 ... +70 ¨¤
    Storage -40 ... +70 ¨¤
 Differential pressure 0 ... 50 mbar 100 mbar
Tolerable overload on one side
1)
   Relative pressure 0.1 ... 10 bar  3x fs
    0 ... 50 mbar 200 mbar
Differential pressure
Rupture pressure    100 ... 500 mbar 5x fs
1)
   Relative pressure 0.1 ... 10 bar 3x fs
Materials in contact with the medium
Pressure connections    PVC
Hose connection    Silicone / PA
Diaphragm      Silicone / Al O (96%) / Silicium
2 3
Sensor housing     PA, PC, Ultem
Sealing material    NBR
O  (96%) / Silicium
Sensor     Al
2 3
Electrical overview
    0 ... 10 V
Output (Selectable by customer)     0 ... 20 mA
     4 ... 20 mA
      17 ... 33 VDC
     24 VAC
Power supply
     115 VAC
     230 VAC
   0 ... 10 V > 2 kOhm
Tolerable load
    0 ... 20 mA / 4 ... 20 mA < 500 Ohm
Current consumption    < 4 VA
  Extra-low voltage Each connection is protected against crossover up to max. power supply
Polarity reversal protection
   Low voltage 230 VAC / 115 VAC only on supply terminals, transformer short-circuit
Dynamic response
Response time     < 20 ms
Load cycle     < 10 Hz
Protection standard    
IP 65
Limit switches
Two potential free change over contacts adjustable over the full range (Adjustment with potentionmeter).
Contact rating     250 VAC / 6A
Switching hysteresis    ~ 1% fs fixed
Electrical connection
2
Screw terminals for 1.5 mm
Pressure connection
Connection pipe (conical)     !à 4 ... 7 m
Quick fitting     !à 3.9 mm / M6x0.7
Display
LED, 3 digit
Mounting instruction
2)
Installation arrangement    Unrestricted
Mounting     Fixing holes integrated in housing
Tests / Admissions
Electromagnetic compatibility    CE conformity acc. EN 61326-2-3
Weight
24 VDC, without display    ~ 440 g
230 VAC, with diplay    ~ 640 g