SIEMENS QBE3000-D/QBE3100-D Differential Pressure Sensor

Product positioning and purpose

Belonging to Siemens Building Technologies differential pressure sensors, used for continuous monitoring of liquid level/flow in HVAC systems.

Applicable media: neutral and weakly corrosive gases and liquids.

Function: Control sensors, building automation measurement value transmitters.

Core Technologies and Advantages

Measurement principle: Ceramic lever sensing technology.

Core advantages: low temperature sensitivity, high temperature resistance, no mechanical aging/creep.

Signal processing: linearization, temperature compensation, amplification output.

Electrical parameters

Parameter QBE3000-D QBE3100-D

Power supply AC24V ± 15%/DC18-33V DC11-33V

Output signal DC0-10V DC4-20mA

Working resistance>10k Ω power supply -11V

Power consumption<5mA (AC24V)<20mA

Short circuit protection, reverse polarity protection, short circuit protection, reverse polarity protection

Range and Model (Core)

Range: 0-1, 1.6, 2.5, 4, 6, 10, 16 bar (corresponding to 0-1.6 MPa).

QBE3000-D: Voltage output, material numbers S55720-S173~S178, S186.

QBE3100-D: Current output, material numbers S55720-S179~S184, S187.

Machinery and interfaces

Pressure interface: G1/8 “external thread, equipped with 6mm copper pipe joint.

Shell: Aluminum AlMgSi1, Stainless Steel 1.4305, Ceramic.

Sealing: FPM fluororubber.

Wiring plug: DIN 175301-803-A, PG9 cable gland.

Weight: Including packaging 0.43kg.

Protection: IP65, protection level III.

Environment and Performance

Medium temperature: -15~+85 ℃.

Environmental temperature: Operating -15~+85 ℃; Storage -40~+85 ℃.

Accuracy:<± 0.5% FS, zero/full-scale<± 0.4% FS.

Response time:<5ms.

Long term stability: ± 0.5% FS.

Unilateral overload: ≤ 2 times the rated pressure.

System pressure: ≤ 6bar corresponds to a range of 25bar; A range of ≥ 10 bar corresponds to 50 bar.

Blasting pressure: 1.5 times the system pressure.

Humidity:<90% RH (non condensing).

Maintenance: Maintenance free.

Installation and Accessories

Standard configuration: installation bracket, 2 6mm copper pipe threaded joints.

Remote installation: accessory AQB2002 (1m capillary copper tube, brass adapter).

Liquid installation requirements: The sensor should be installed below the pressure measuring point, on a shock-absorbing surface, and in the exhaust system.

Installation position: air duct, wall, ceiling, control cabinet, in any direction (factory calibration interface facing downwards).

Compliance standards

Certification: CE, C-Tick, EMC 2004/108/EC.

Standards: EN 61000-6-2/3, EN 61326, RoHS 2002/95/EC.

System: ISO9001, ISO14001, SN 36350.

Key questions and answers

What is the core difference between QBE3000-D and QBE3100-D?

Answer: The core difference lies in the output signal and power supply range: QBE3000-D outputs DC0-10V and supplies AC24V/DC18-33V; QBE3100-D outputs DC4-20mA and is powered by DC11-33V, with completely identical ranges for both.

What are the key requirements that must be followed when installing this sensor in liquid media?

Answer: Three points must be met: ① The installation position of the sensor is lower than the pressure measuring point; ② Fixed on a vibration free surface; ③ Thoroughly exhaust the system after installation to avoid measurement errors and sensor damage.

What are the accuracy, protection level, and long-term stability of the sensor?

Answer: Measurement accuracy * *<± 0.5% FS * *, protection level IP65, long-term stability * * ± 0.5% FS * * (compliant with DIN EN 60770), with excellent long-term reliability.