Series 423X, 425X and 426X

Barksdale_Press Transducer_420X Description
Barksdale's 420X Series Explosion Proof Transducers prevent an explosion from occurring when operated in a Division 1 environment. Barksdale's 420X Series transducers prevent personal injury and machinery damage by preventing the explosion the first place. Energy generated within the transducer is of such a low level that intermittently present flammable vapors will not be ignited. External zener barriers are not required in order to meet UL requirements for a non-incendive installation. The lower cost of not having to install zener barriers means that the positive aspects of intrinsically safe and explosion proof are combined in Barksdale non-incendive transducers. Three models are available: Series 423X (0-5V), Series 425X (4-20mA) and Series 426X (0-10V).



  • Diffused silicon sensor for high accuracy
  • Explosion proof enclosure for hazardous locations
  • Superior EMI, ESD and RFI protection
  • Rugged stainless steel construction
  • NEMA 4X, 7 and 9
  • ATEX approved for 425X Series only
  • Modular concept
  • Built-in high pressure snubber (2000 psi and above)
  • cULus, CE approved


  • Oil & gas pipelines
  • Oil patch
  • Petrochemical plants
  • Refineries
  • Pulp and paper mills
  • Coal and oil fired power plants
  • Cement plants
  • Gas transfers for fuel systems
  • Gas panels
  • Gas mixing systems


Accuracy (LH & R): ±0.25% BSL (±0.5% for vacuum only [-23])
Long Term Stability: ±0.5% FSO of calibration curve
Typical Life Cycle: 100 million cycles
Proof Pressure: 2 times rated pressure or 13,000 psi max. (884 bar), whichever is less
Excitation voltage: 9 to 28 VDC
Excitation voltage: 14 to 28 VDC
Excitation voltage: 12 to 28 VDC
Supply Current: 3.0 mA maximum (no load)
Output: 0.5 to 5.5 VDC
Full scale output: 5.0 VDC ± 0.8%
Zero output: 0.5 VDC ± 0.4%
Output: 1 to 11 VDC
Full scale output: 10 VDC ± 1%
Zero output: 1.0 VDC ± 2%
Output: 4 to 20 mA
Full scale output: 16 mA ± 1%
Zero output: 4 mA ± 2%
Wetted Parts: 17-4 PH (fitting) & 316 stainless steel (sensor)
Enclosure: NEMA 4, 300 series stainless steel
Pressure Connection: 1/4"-18 NPT male
Electrical Connection: 3 conductor for voltage series and 2 conductor for current series, 24 awg, PVC jacketed, shielded cable, 3 ft. (1 m) long with integral strain relief and case ground (standard).
Temperature Ranges:
-40° to 185°F (-40° to 85)°C
30° to 160°F (-1° to 71)°C
-40° to 185°F (-40° to 85)°C
Temperature Shift:
Zero & Span:
0.0125% per °F over compensated range 75°F reference
Vibration: 15 g's, 10-2000 Hz, MIL-STD 202
Shock: 50 g's, 11 mS, MIL-STD 202 Method 213, Cond. G.
425X only:
UL cUL approved as telemetering equipment for use in hazardous locations (UL File E146589, WYMV, WYMV7) as follows:
Class I, Div. 1, Groups A, B, C & D
Class II, Groups E, F & G, when installed in accordance with control drawing 272148.
DEMKO 04 ATEX 0334369X Ex d IICT5 / Ex t0
A21 IP66 T100°C, ATEX Ex II2GD
423X & 426X:
7.4 oz. (221 grams) to 1000 psi
9.9 oz. (281 grams) 2,000 psi and higher
7.4 oz. (210 grams) to 1000 psi
9.4 oz. (266 grams) 2,000 psi and higher
Warranty: 1 year warranty