Series 450

  • Lightweight, compact and all-welded rugged stainless steel construction
  • High performance sensors for high accuracy
  • Optional HART® communication protocol with diagnostics & field calibration, reducing maintenance time and cost; and 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)
  • cULus Certification for Ordinary Locations
  • IP66 & IP67 and NEMA 4X Protection
  • CE, CRN, NACE compliant and Superior EMC/EMI protection
  • RoHS / REACH Compliant

Barksdale Intelligent Transmitters (BiT), Series 450 is a high pressure transmitter with HART® communication protocol option. HART® enabled sensors can communicate over the legacy two-wire 4-20 mA analog current loops offering smart features like transmitter diagnostics, calibration, and field re-ranging up to 10 times less than calibrated full scale output (10:1 turndown ratio). Three models are available: Series H455, 4-20 mA output with HART® Comm. Protocol; Series 455, 4-20 mA output; Series 452, 1-5 VDC output. These models can be configured with 24-standard pressure ranges from vacuum to 30,000 psi and multiple process connections from 1/4” NPT to 7/16” SAE and HF4 Autoclave high-pressure connections. Multiple electrical connections are also offered, including popular industrial and MS style connectors for easy connection. Series 450 offers cULus approval for ordinary location.


General Specifications*

including Linearity,
Hysteresis and Repeatability:
at 75°F, Typical
±0.1% of Calibrated FSO (Option [–A1])
±0.25% of Calibrated FSO (Standard)
±0.5% of Calibrated FSO (Vacuum only [-23])
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 7500 psi models
1.5X range for 7500 – 30000 psi models
Excitation voltage: 9 to 30 VDC
Excitation voltage: 9 to 30 VDC
Excitation voltage: 12 to 30 VDC
* (SELV, PELV), Class II Power Supply
Supply Current:

H455 & 455:


20mA max.

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%

Output: 1–5 VDC
Full scale output: 5.0 VDC ± 1%
Zero output: 1.0 VDC ± 1%

Response Time:
455 & 452:
<70 milliseconds
<50 milliseconds
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: 3 conductors for voltage output series and 2
conductors for current output series, 18 AWG, 80”
(2 m) long with integral strain relief and case ground
(standard). Jacketed cable (optional). Halogen free
wires and cable.
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.

cULus approved for ordinary locations
(UL 61010-1)
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, CRN (refer to drawing # 272479 for applicable models)
NACE (316L SS or 718 Inconel wetted material)
Compatibility (EMC)
IEC/EN 55011:
IEC/EN 61000-4-2:

IEC/EN 61000-4-3:

IEC/EN 61000-4-4:

H455:455 & 452:

IEC/EN 61000-4-5:

455 & 452:

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

EFT (Burst) Test, +/-1 kV

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

Surge test not applicable; Class II power
supply used at input of the device

RF Immunity, 150 kHz – 80 MHz, 3V

Weight: 16 Ounces (453 grams)
Warranty: 1 year warranty


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