Siemens QBE2003-P1 Pressure Sensor

หมายเลขคำสั่งซื้อ: S55720-S290

1. คำจำกัดความของโมเดลพื้นฐาน

QBE2003-P1

QBE: Pressure transmitter series

2003: 3-wire DC 0–10 V voltage output

ป: เกจวัดแรงดัน

1 = Measuring range: 0～1 bar (0～0.1 MPa, 0~100kPa)

Similar form factor current output variant: QBE2103-P1 (4~20mA 2-wire) – do not confuse.

2. ข้อมูลจำเพาะทางไฟฟ้าหลัก
3. แหล่งจ่ายไฟ (identical to QBE2003-P16)

เครื่องปรับอากาศ 24 วี (standard power for BMS DDC controllers)

DC 12～33 V wide-range DC input

การใช้พลังงาน: ＜7 mA

⚠️ Never connect to AC220V

2. สัญญาณเอาท์พุต

DC 0～10 V, 3-ระบบสายไฟ; Load impedance ＞10 kΩ

3. Hirschmann pin assignment (DIN EN175301-803-A)

Pin1: พลังบวก (เอซี24วี / ดีซี+)

Pin2: 0~10V signal output

Pin3: Common GND (power ground + signal ground)

3. Pressure Performance Parameters

ช่วงการวัด: 0～1 bar (0～100kPa) gauge pressure

ความแม่นยำ: Typical ±0.3 %FS; Maximum ±0.5 %FS

เวลาตอบสนอง: ＜2 ms

Maximum overpressure: 3 × FS = 3 บาร์

แรงดันระเบิด: ＞3 bar

✅ Important distinction: Models P1/P1.6/P4 withstand 3×FS overpressure; high-range versions P6/P10/P16 only support 2.5×FS overpressure.

4. เครื่องกล & พารามิเตอร์ด้านสิ่งแวดล้อม

Pressure connection: G½” external thread with internal M5 thread (for mounting damping screw to suppress pressure spikes)

⚠️ QBE2003-P10/P16/P25 have no internal M5 thread — this is a key hardware difference between P1 and P16.

Diaphragm material: 1.4404 (316แอล สแตนเลส)

Compatible media: เป็นกลาง, weakly corrosive liquids/gases (น้ำ, glycol mixtures, compressed air, light oil)

อุณหภูมิปานกลาง: -15 ℃~ +125 ℃

อุณหภูมิในการทำงานโดยรอบ: -30 ℃~ +85 ℃

ระดับการป้องกัน: IP65

การวางแนวการติดตั้ง: Any position

5. สถานการณ์การใช้งานทั่วไป (Specialized for 0~1bar low pressure range)
6. Static pressure monitoring of atmospheric tanks and expansion vessels
7. Chilled/hot water static pressure & low-pressure supply circuits in HVAC systems
8. Static pressure measurement for fresh air ducts
9. Low-pressure air supply & low-pressure atmospheric gas pipelines
10. Low-pressure return circuit monitoring on plate heat exchanger units
11. QBE2003-P1 VS QBE2003-P16 Comparison

7. การคัดเลือก & On-site Troubleshooting Tips
8. This model has a very narrow measuring range. Not recommended if sustained system working pressure exceeds 0.8 บาร์, as operating point will approach full scale.
9. For applications with severe pressure pulsation, install damping screw via the M5 internal thread.
10. For DDC 0~10V signal acquisition, เซ็นเซอร์ GND must share common ground with the controller.
11. Install isolation device if medium contains strong acid, alkali or seawater.
12. Not directly interchangeable with the 4~20mA variant QBE2103-P1.

Domestic Replacement Options for ซีเมนส์ QBE2003-P1 / QBE2003-P16

Mandatory Replacement Prerequisites (All conditions must be satisfied for direct DDC system swap)

✅ Output: 3-wire DC 0~10V

✅ Electrical connector: DIN43650A Hirschmann plug

✅ Pressure thread: G½” ด้ายภายนอก

✅ Power supply: Compatible with AC24V / DC12~33V (critical for BMS! Most standard domestic transmitters only support DC24V. Specify AC24V compatibility when placing orders.)

✅ Diaphragm: 316แอล สแตนเลส, medium temperature resistance ≥100℃ (suitable for hot water/glycol HVAC systems)

✅ Range selection:

Replacement for QBE2003-P1: 0～1 bar (0～0.1MPa) gauge pressure

Replacement for QBE2003-P16: 0～16 bar (0～1.6MPa) gauge pressure

1. Mainstream Domestic Models (Preferred for HVAC & ระบบอัตโนมัติในอาคาร)
2. PCM300 (Universal industry model, widely stocked, cost-effective first choice)

Complete ordering specification example:

PCM300-G1/2-0~1bar-0~10V-Hirschmann-AC/DC24V

PCM300-G1/2-0~1.6MPa-0~10V-Hirschmann-AC/DC24V

ความแม่นยำ: ±0.5%เอฟเอส; ±0.25%FS optional

อุณหภูมิปานกลาง: -20～125℃; 316L isolation diaphragm

⚠️ Mandatory order remarks: 3-wire 0~10V, AC24V compatible power supply, G1/2 เกลียวนอก

2. Hongrun OHR-M2 (Widely used in BMS projects, ประสิทธิภาพที่เชื่อถือได้)

รหัสรุ่น: OHR-M2-G12-XXX-0~10V

Hirschmann connector & G½ thread available; AC24V customizable

Strong anti-interference against power frequency noise, ideal for installation near pump rooms with variable frequency drives

ระดับความแม่นยำ 0.5, low long-term drift

3. LEEF LFT2010 (Major automation component supplier, consistent batch quality)

โมเดลเต็ม: LFT2010-G1/2-0~1bar(0~1.6MPa)-0~10V-DIN connector

Native wide voltage support, AC24V rectifier circuit available on request

Housing dimension highly consistent with Siemens QBE2003, no modification required for mounting space

4. Shangrun SIN-P300

SIN-P300-G1/2-0~0.1MPa / 0~1.6MPa, 0~10V 3-wire, Hirschmann connector

Established domestic instrumentation manufacturer, suitable for bulk project procurement

5. Changhui SWP-ST61 (High-precision alternative)

ปรับแต่งได้: 0~10V output, AC24V supply, G1/2 thread; ±0.25%FS accuracy optional, matching Siemens ±0.3%FS accuracy class

1. Low-Cost Generic Compact Models (For breakdown maintenance & อะไหล่)

General compact diffusion silicon pressure transmitter form factor:

Verbal specification template to forward to suppliers:

Compact pressure transmitter, DIN Hirschmann connector, G1/2 เกลียวนอก, gauge pressure 0~1bar (or 0~1.6MPa), 3-wire 0~10V output, power supply AC24V/DC12~33V, 316ไดอะแฟรม L, max medium temperature 120℃, IP65

III. Critical Replacement Risks & Preventive Guidelines

1. Power Supply Pitfall

Standard domestic versions only support DC24V DC, cannot operate directly with AC24V power from DDC cabinets.

Without pre-customized AC rectification circuit, abnormal operation will occur after power-up!

Original Siemens unit has built-in rectifier and supports AC24V inherently.

2. Thread Specification Check

Default thread for many domestic transmitters is M20×1.5. Explicitly specify G½” (G1/2) ด้ายภายนอก, otherwise pipe threads will not match.

3. Special Note for P1 Model Replacement

Siemens QBE2003-P1 base is equipped with M5 internal damping thread; most generic domestic transmitters omit this feature.

If severe pressure fluctuation or water hammer exists on site, an external pressure damper must be installed separately.

4. Pin Assignment Matching

Request domestic transmitter pin definition consistent with original unit:

Pin1=Power positive, Pin2=Signal output, Pin3=Common GND.

Mismatched pinout causes reversed signal or zero output.

5. Temperature Limitations

Standard domestic transmitters usually limit medium temperature to 80℃.

Specify high-temperature variant (max 125℃) for hot water circuits (>90℃) in HVAC systems.

1. Model Selection Priority Recommendation
2. Large-scale commercial projects, long-term continuous use: LFT2010 / OHR-M2 (ประสิทธิภาพที่มั่นคง & reliable supply)
3. Emergency repair, spare stock, cost control: PCM300 (largest spot inventory)
4. High-precision requirement, precise monitoring for heat exchange stations: SWP-ST61 (0.25 ระดับ)