Chongqing Chuanyi PDS843MH-1CS11-D1DA Differential Pressure Transmitter

The PDS843 Smart Differential Pressure Transmitter combines world-class design philosophy with modular electronics to set a new standard in process measurement reliability. Built around a precision monocrystalline silicon sensor and an advanced digital signal processing unit, this transmitter achieves fast response times below 90ms with linear temperature compensation. Whether measuring high-static differential pressures up to 42 MPa, micro-differential pressures down to 50 Pa, or integrating with primary flow elements like orifice plates and Venturi tubes for accurate flow monitoring, the PDS843 guarantees superior field consistency and minimal drift.

Constructed to withstand severe chemical load and mechanical stress, the PDS843 features an IP66/IP67 heavy-duty housing available in die-cast aluminum or 316 stainless steel. Its versatile wetted parts—including 316L, Hastelloy C-276, Tantalum, Monel, and Gold-plated 316L diaphragms—ensure maximum corrosion resistance against chlorine, salt water, and aggressive media.

Advanced internal intelligent diagnostics actively monitor sensor health, impulse line blockages, process temperature, and transient pressure fluctuations, automatically outputting alarm signals (3.6mA or 22.8mA) to protect critical Safety Instrumented Systems (SIS). Field operators can effortlessly configure rangeability up to 100:1, zero/span adjustment, damping, and display units through the external magnetic three-button interface without opening the housing cover, preserving intrinsic safety and explosion-proof integrity in hazardous locations.

FAQ
Q1: How does the PDS843 transmitter perform flow measurement?
A1: The PDS843 measures the differential pressure drop created across a primary flow element, such as an orifice plate, Venturi tube, or Pitot tube, inserted in the pipe. By applying Bernoulli’s principle, the device calculates the fluid flow rate accurately and outputs a proportional signal via HART, PROFIBUS-PA, or FOUNDATION Fieldbus protocols.

Q2: Can the PDS843 be calibrated and configured directly in the field?
A2: Yes, the transmitter features three local push-buttons and a high-contrast backlit LCD screen, allowing field operators to adjust zero, span, damping, unit selection, and range settings up to a 100:1 turndown ratio without opening the enclosure cover or interrupting explosion-proof protection.

Q3: Which communication protocols and hazardous area certifications are available?
A3: The PDS843 supports 4-20mA DC overlay HART 6.0/7.0, PROFIBUS-PA (v3.02), and FOUNDATION Fieldbus (v6.1.1). It comes with full international explosion-proof and safety approvals, including ATEX, IECEx, NEPSI, EAC, SIL2/3 (TÜV), and CCS marine certification.

Technical Specifications

Reviewed product specifications

PDS843M Differential & PDS843H High Static Pressure Ranges	C：Minimum range: 0.5 kPa; Maximum range: 10 kPa; Measurement range: -10 to 10 kPa; Overload limit (M): 16 MPa; Overload limit (H): — D：Minimum range: 1.0 kPa; Maximum range: 100 kPa; Measurement range: -100 to 100 kPa; Overload limit (M): 16 MPa; Overload limit (H): 42 MPa E：Minimum range: 5.0 kPa; Maximum range: 500 kPa; Measurement range: -500 to 500 kPa; Overload limit (M): 16 MPa; Overload limit (H): 42 MPa F：Minimum range: 0.03 MPa; Maximum range: 3 MPa; Measurement range: -0.5 to 3 MPa; Overload limit (M): 16 MPa; Overload limit (H): 42 MPa G：Minimum range: 0.14 MPa; Maximum range: 14 MPa; Measurement range: -0.5 to 14 MPa; Overload limit (M): 16 MPa; Overload limit (H): —
PDS843L Low Differential Pressure Ranges	C：Minimum range: 0.1 kPa; Maximum range: 2.0 kPa; Measurement range: -2 to 2 kPa; Overload limit: 200 kPa D：Minimum range: 0.1 kPa; Maximum range: 2.0 kPa; Measurement range: -2 to 2 kPa; Overload limit: 3.2 MPa E：Minimum range: 50 Pa; Maximum range: 100 Pa; Measurement range: -100 to 100 Pa; Overload limit: 200 kPa
Range Ratio	Maximum Range Ratio (r = Maximum Range / Used Range) = 100:1
Long-Term Stability	δ ≤ ±0.1%FS/10 years δ ≤ ±0.2FS%/10 years, applicable to PDS843L differential pressure C and D ranges
PDS843M Differential Pressure Range Code: E, F, G 843H High Static Pressure Range Code: E, F	δ ≤ ±0.025% δ ≤ ±（0.01+0.0015 Maximum Range/Used Range）%, Rangeability >10:1 δ ≤ ±(0.01+0.0015 Maximum Range/Used Range)%, Rangeability >10:1
PDS843M Differential Pressure Range Code: C	δ ≤ ±(0.013+0.027 Maximum Range/Used Range)%, Rangeability ≤20:1
PDS843M Differential Pressure Range Code: D 843H High Static Pressure Range Code: D	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
843L Low Differential Pressure Range Code: C, D	δ ≤ ±(0.05+0.025 Maximum Range/Used Range)%, Rangeability ≤20:1
843L Low Differential Pressure Range Code: E	δ ≤ ±0.1%
Temperature Effect	δ ≤ (0.06°r+0.01)%/28℃，-40℃ ~ +80℃
Process temperature range	-40℃～+120℃ (Fluorized oil: -52℃~150℃)
Static pressure effect	δ≤±0.03r%/16MPa δ≤±0.1r%/3.2MPa, applicable to PDS843M range C (10kPa) δ≤±0.2r%/3.2MPa, applicable to PDS843L differential pressure range D (2kPa) δ≤±0.03r%/200kPa, applicable to PDS843L differential pressure range C (2kPa)

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