Chongqing Chuanyi PDS803GH-1BS1-D1DA Pressure Transmitter

The Chongqing Sichuan Instrument (SIC) PDS803 High-Precision Smart Direct-Mount Pressure Transmitter represents a cutting-edge solution for industrial process automation, combining world-class monocrystalline silicon composite sensing technology with modular electronics and high-rigidity structural design. Engineered to perform in the most demanding process environments, the PDS803 delivers outstanding baseline accuracy of up to ±0.025% FS, a 100:1 wide turndown ratio, and extraordinary long-term stability with drift within ≤±0.1% FS over a 10-year span, thereby drastically minimizing life-cycle maintenance costs and calibration frequency. Its integrated direct-mount construction mounts seamlessly onto process piping, manifolds, or sampling taps, eliminating traditional impulse lines, reducing leakage risks, and significantly streamlining installation in tight space constraints.

Housed in an IP66/IP67 rated, heavy-duty die-cast aluminum or stainless steel enclosure, the PDS803 provides superior immunity against severe electromagnetic interference, lightning surges up to 20,000A, extreme ambient temperatures ranging from -60°C to +80°C, and dynamic process temperatures up to 700°C. Designed with comprehensive safety and diagnostic capabilities, the unit features built-in self-monitoring across sensor health, electronic memory (ROM, RAM, EEPROM), impulse line blockage detection, and process temperature tracking, triggering configurable 3.6mA or 22.8mA fault signals to support safety instrumented systems (SIS) under TÜV SIL2/SIL3 standards. Furthermore, field operators can easily execute zero/span adjustments, damping adjustments, and unit toggling through three non-intrusive local pushbuttons without opening the cover, preserving explosion-proof integrity across hazardous ATEX, IECEx, and NEPSI locations. Supporting digital communications via HART 7.0, PROFIBUS-PA (v3.02), and FOUNDATION Fieldbus (v6.1.1), as well as a wide range of anti-corrosive diaphragm materials including 316L, Hastelloy C-276, Tantalum, Monel, Gold-plating, PTFE, PFA, and EN1.4466, the PDS803 provides a versatile, ultra-reliable solution for oil & gas, chemical processing, power generation, metallurgy, pharmaceutical, and water treatment applications.

FAQ
Q1: What is the main structural advantage of the Chongqing Sichuan Instrument (SIC) PDS803 direct-mount design?
A: The PDS803 features a direct-mount threaded connection that installs directly onto the sampling point or manifold block. This compact, lightweight form factor (1.6 kg for aluminum housing) eliminates complex impulse piping, minimizes potential leak paths, speeds up field installation, and improves dynamic response time in tight spatial layouts.

Q2: How does the local configuration work without compromising explosion-proof security?
A: The PDS803 is equipped with three non-intrusive external push buttons beneath the display. Operators can calibrate zero/span points, set damping values from 0 to 100 seconds, change engineering units, and perform loop diagnostics directly on site without opening the housing cover. This maintains full IP67 and Ex d flameproof isolation at all times.

Q3: Can the PDS803 transmitter handle highly aggressive or corrosive process media?
A: Yes. The transmitter offers a broad array of anti-corrosion wetted parts. Isolating diaphragms can be customized in 316L, Hastelloy C-276, Monel, Tantalum, or 316L Gold-Plated materials, combined with degreased cleaning and specialized fluorinated fill oils to safely handle strong acids, alkalis, chlorine gas, and seawater applications.

Q4: Is the transmitter compatible with existing Safety Instrumented Systems (SIS)?
A: Fully compatible. The Chongqing Sichuan Instrument PDS803 carries TÜV SIL2/3 functional safety certifications and supports advanced continuous self-diagnostics. In the event of a sensor or electronics fault, it immediately triggers user-pre-configured low (3.6 mA) or high (22.8 mA) alarm output currents to safeguard critical plant equipment and automatic shutdown loops.

Technical Specifications

Reviewed product specifications

Turndown Ratio	Maximum range ratio r (r = maximum range / used range) = 100:1
Long-Term Stability	δ≤±0.1%FS/10 years
Temperature Effect	δ≤(0.06*r+0.01)%/28℃， -40℃～+80℃
Process Temperature Range	-40℃～+120℃ (Fluorosol: -52℃~150℃)
PDS803G gauge pressure sensor range	B：Minimum range: 1.0 kPa; Maximum range: 100 kPa; Measurement range: -100 to 100 kPa; Overload limit: 600 kPa C：Minimum range: 4.0 kPa; Maximum range: 400 kPa; Measurement range: -100 to 400 kPa; Overload limit: 1.5 MPa D：Minimum range: 30 kPa; Maximum range: 3000 kPa; Measurement range: -100 to 3000 kPa; Overload limit: 4.5 MPa E：Minimum range: 0.2 MPa; Maximum range: 20 MPa; Measurement range: -0.1 to 20 MPa; Overload limit: 30 MPa F：Minimum range: 0.4 MPa; Maximum range: 40 MPa; Measurement range: -0.1 to 40 MPa; Overload limit: 60 MPa G：Minimum range: 0.7 MPa; Maximum range: 70 MPa; Measurement range: -0.1 to 70 MPa; Overload limit: 105 MPa
PDS803A Absolute Pressure Ranges	B：Minimum range: 0.5 kPa; Maximum range: 25 kPa; Measurement range: 0 to 25 kPa(A); Overload limit: 300 kPa(A) C：Minimum range: 2.6 kPa; Maximum range: 130 kPa; Measurement range: 0 to 130 kPa(A); Overload limit: 500 kPa(A) D：Minimum range: 5.0 kPa; Maximum range: 500 kPa; Measurement range: 0 to 500 kPa(A); Overload limit: 1.0 MPa(A) E：Minimum range: 0.03 MPa; Maximum range: 3 MPa; Measurement range: 0 to 3 MPa(A); Overload limit: 6.0 MPa(A) F：Minimum range: 0.2 MPa; Maximum range: 20 MPa; Measurement range: 0 to 20 MPa(A); Overload limit: 30 MPa(A)
PDS803G Gauge Pressure Range Code: B PDS803A Absolute Pressure Range Code: B, C	δ ≤ ±0.04% δ ≤ ±（0.004+0.0036 Maximum Range/Used Range）%, Rangeability >10:1 δ ≤ ±(0.004+0.0036 Maximum Range/Used Range)%, Rangeability >10:1
PDS803G Gauge Pressure Range Code: C, F, G PDS803A Absolute Pressure Range Code: D	δ ≤ ±0.04% δ ≤ ±（0.015+0.0025 Maximum Range/Used Range）%, Range Ratio >10:1 δ ≤ ±(0.015 + 0.0025 × maximum range/used range)%, Rangeability >10:1
PDS803G Gauge Pressure Range Code: D, E PDS803A Absolute Pressure Range Code: E	δ ≤ ±0.025% δ ≤ ±（0.01+0.0015 Maximum range/Used range）%, Range ratio >10:1 δ ≤ ±(0.01 + 0.0015 × maximum range/Used range)%, Rangeability >10:1
PDS803A Absolute Pressure Range Code: F	δ ≤ ±0.05% δ ≤ ±（0.015+0.0035 Maximum range/Used range）%, Range ratio >10:1 δ ≤ ±(0.015 + 0.0035 × maximum range/Used range)%, Rangeability >10:1

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