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Plastic case
Stainless steel case with electropolished surface
Stainless steel case with electropolished surface

WIKA Models UPT-20, UPT-21 Process transmitter

$120.00

The WIKA Models UPT-20 and UPT-21 are versatile process transmitters designed for simultaneous pressure and temperature measurement in industrial applications. These compact instruments integrate multiple measurement functions into a single device, reducing installation complexity and costs. The UPT-20 features a standard configuration while the UPT-21 offers enhanced capabilities for more demanding applications. Both models provide reliable performance in hydraulic systems, compressor monitoring, and process control with flexible mounting options and comprehensive communication protocols. Their robust construction ensures accurate multi-parameter monitoring in demanding industrial environments where space optimization and measurement reliability are essential.

Models UPT-20, UPT-21 Data sheets

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Applications

  • Control and process technology
  • Machine building and plant construction
  • Pharmaceutical and hygienic industries
  • Food industry
  • Chemical, petrochemical industry

Special features

  • Multi-functional display
  • Simple menu navigation
  • Conductive plastic case or stainless steel case (optionally with electropolished surface)
  • Large LC display, rotatable
  • Approvals for hazardous areas
Gauge pressure ranges

bar 0 … 4,000
psi 0 … 60,000
Absolute pressure ranges

bar 0 … 40
psi 0 … 500
Vacuum and +/- measuring ranges

bar -1 … +40
psi -14.5 … +600
Output Signal types

■ 4 … 20 mA
■ 4 … 20 mA with HART® signal (option)
Load in Ω

■ ≤ U+ – 12 V / 0.023 A (non-Ex)
■ ≤ U+ – 14 V / 0.023 A (Ex)
U+ = Applied supply voltage (→ see “Supply voltage”)
Dampening

0 … 99.9 s, adjustable
After the set dampening time the instrument outputs 63 % of the applied pressure as output signal.
Accuracy at reference conditions

■ 0.15 % of span
■ 0.1 % of span (option 1)
■ 0.2 % of span (option 2)
■ 0.5 % of span (> 1,000 bar [15,000 psi]) (option 3)
Supply voltage U+

DC 12 … 36 V
Voltage supply (Ex)

Supply voltage U+: DC 14 … 30 V
Maximum voltage Ui: DC 30 V
Maximum current Ii: 100 mA
Maximum power Pi (gas) :1,000 mW
Maximum power Pi (dust) :750/650/550 mW (depending on the max. ambient temperature)
Effective internal capacitance: 11 nF
Effective internal inductance: 100 μH
Model UPT-20 Pressure transmission medium

Measuring range ≤ 40 bar [500 psi]: Synthetic oil (halocarbon oil for oxygen applications)
Measuring range > 40 bar [500 psi]: Dry measuring cell
Model UPT-21 Pressure transmission medium

Synthetic oil
Materials

Stainless steel 1.4404 / 316L
Stainless steel 1.4534 / 904L
Hastelloy® HC276 / 2.4819
Gold-plated
Electrical connection

Spring-loaded terminals
Cable glands M20 x 1.5
Angular connector DIN 175301-803A
with mating connector
Circular connector M12 x 1 (4-pin)
without mating connector
Electrical safety
Display type

LC display
Approvals

EU declaration of conformity
ATEX directive
IECEx
EAC
GOST
…

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