Series 450E

  • Intrinsic safety certification with ATEX, IECEx and CSA approvals
  • Lightweight, compact and all-welded rugged stainless steel construction
  • High performance sensors
  • Optional HART® communication protocol with diagnostics & field calibration, reducing maintenance time and cost; 10:1 turndown ratio for re-ranging, maintaining high accuracy and allowing one part number for multiple pressure ranges
  • High accuracy: ±0.1% and 0.25% FSO, (L,H,R)
  • Additional CSA certification for ordinary locations
  • Factory sealed IP66 & IP67 and NEMA 4X enclosure
  • CE, NACE compliant and superior EMC/EMI protection
  • RoHS / REACH Compliant

Barksdale Intelligent Transmitters (BiT), Series 450E and H450E are BiT's Intrinsically Safe models. Barksdale has been manufacturing explosion proof transmitters for many years allowing their use in Class I Div 1 or Zone 0, 1 hazardous location. So why introduce an Intrinsically Safe (I.S.) model?  Explosion proof wiring requires metal conduit and special explosion proof sealing glands and junction boxes which are not practical for equipment that needs to be quickly rigged or broken down to modular sections to transport on roads to the next location such as Drilling, Frac or other mobile equipment. I.S. protection concept allows use in the same hazardous areas as explosion proof only with the same flexible cables and electrical connections used in ordinary locations including industrial and military style connectors used on our BiT 450 ordinary location models. Maintenance of systems is greatly simplified with quick electrical disconnects and no expensive explosion proof boxes that are susceptible to scratches on sealing flame path surfaces during maintenance. Barksdale’s new intrinsically safe models also include advanced Thin-Film and HART technology providing all of the advantages of our other models including high accuracy and long term stability.


General Specifications*

Accuracy (LH & R):
at 75°F, Typical
±0.10% of Calibrated FSO (Option [–A1])
±0.25% of Calibrated FSO (Standard)
±0.50% of Calibrated FSO (Vacuum only
Temperature Shift: Zero & Span: 0.0125% Per °F over the compensated temperature range
Long Term
Stability:closure rating:
±0.2% FSO /year of calibration curve
Typical Life Cycle: 100 million cycles
Proof Pressure: 2X range for up to 7,500 psi models
1.5X range for 7,500 – 30,000 psi models
Input: Excitation voltage: 9 to 30 VDC
Supply Current: 20mA max.
Output: 4–20 mA with HART® Protocol
Full Scale Output: 20 mA ±1%
Zero output: 4 mA ±1%Output: 4–20 mA
Full Scale Output: 20 mA ±1%
Zero output: 4 mA ± 1%
Response Time:
Enclosure: All welded 300 series stainless steel. IP66 & IP67
and NEMA 4X rated. 316 Stainless Steel (optional)
Wetted Parts:
17-4 PH Stainless steel (more than 10k psi)
316L Stainless steel (up to 10k psi)
Inconel (optional: up to 10k psi)
17-4 PH Stainless steel for -UL option (10k psi)17-4 PH Stainless steel (all ranges)
316L Stainless steel and 718 Inconel (optional: up to
10k psi)
Corrosive and Acidic:
(up to 10,000 psi)
Gas, vapor, liquid and viscous fluids [-Z17]718 Inconel wetted material, NACE [-NC], and 316L stainless steel, NACE [-SS]
Pressure Connection:
13 available options. Refer to product configurator
for available connections and ranges.
Electrical Connection: 10 available electrical connections such as M12, Bendix, DIN, conduit, gland and etc. Option for free leads from conduit or gland electrical connection includes two signal leads plus ground lead consisting of 18AWG halogen free type, 80” (2m) long or optional jacketed cable exiting 1/2 NPT or M20 conduit or gland connections.
Temperature Ranges:
Operating (Ambient):
-40 to +176 °F (-40 to +80 °C)
0 to +165 °F (-18 to +74 °C)
-40 to +176 °F (-40 to +80 °C)
-40 to +185 °F (-40 to +85 °C)
Vibration: 10 g’s, 10-500 Hz, MIL-STD 202, Method 204, Cond. A
Shock: 50 g’s, 11 mS, MIL-STD 202 Method 213, Cond. G.


cCSAus Ordinary LocationscCSAus Intrinsic Safety for Hazardous Locations
Class I, Div. 1, Groups A, B, C & D
Class II, Div. 1, Groups E, F & G
Ex ia IIC T4 Ga
Ex ia IIIC T135°C Da
Class 1 Zone 0, AEx ia IIC T4 Ga
Zone 20 AEx ia IIIC T135°C Da

Factory sealed IP66 & IP67 and NEMA 4X enclosure

CE 0081
Ex II 1 G D
Ex ia IIC T4 Ga
Ex ia IIIC T135°C Da, IP66 & IP67
-40 °C ≤ Tamb ≤ +80 °C
CML 19 ATEX 2240X
IECEx CML 19.0066X

HART® Protocol:

Turndown Ratio:

Analog Output

Sensor Trim:


HART® 7.6

10:1 (Full scale output rangeability)

Adjustable zero and span of 4-20mA.
Full scale range must be ≥ (calibrated
span / 10)

Sensor zero and full scale trim

Transmitter failure indicated by off-scale
analog signals to alarm the user

See HART Installation and Operation
Manual 272438 for detailed information

Compliances: CE,
NACE (316L SS or 718 Inconel wetted material)
Capability (EMC)
IEC/EN 55011:
IEC/EN 61000-4-2:

IEC/EN 61000-4-3:

IEC/EN 61000-4-4:

IEC/EN 61000-4-5:

IEC/EN 61000-4-6:

Emission & radiated emission for class A

Electrostatic discharge (ESD) test – contact
discharge +/-4 kV, Air discharge +/-8 kV

Radiated RF, EM field immunity
80mhz-1ghz, 3v/M

EFT (Burst) Test, +/-2 kV

Surge Test, +/-1kV on lines, +/-2kV between
line and earth ground

RF Immunity, 150 kHz – 80 MHz, 3V

Weight: 16 Ounces (453 grams)
Warranty: 1 year warranty
Installation: Intrinsic Safety Installation for Hazardous Locations:
Install per Barksdale Control Drawing 272471


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