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PRODUCT DESCRIPTION
QBM81-3 Differential pressure switch, 20 to 300 Pa
Siemens QBM81-3 is an adjustable differential pressure switch for air and non-aggressive gases. It is used in ventilation and building-service pressure monitoring applications. The manufacturer data further identifies the product family as QBM81, the device type as Differential pressure switch, the measured medium as Air and non-aggressive gases, the pressure range as 20 to 300 Pa, the equivalent range as 0.2 to 3 mbar, the setpoint as Adjustable, and the switch function as Differential pressure switching.
The switch covers a differential-pressure range from 20 to 300 Pa, equivalent to 0.2 to 3 mbar. Its adjustable switching point supports filter monitoring, airflow status detection and pressure supervision. The remaining technical data identifies the monitoring function as Filter and airflow supervision, the signal type as Binary switching contact, the measurement principle as Pressure differential, the application system as Ventilation and building services, the process connection as Dual pressure ports, the control role as Pressure status detection, the medium class as Clean gas, and the product lifecycle as Active product.
The switch covers a differential-pressure range from 20 to 300 Pa, equivalent to 0.2 to 3 mbar. Its adjustable switching point supports filter monitoring, airflow status detection and pressure supervision. The remaining technical data identifies the monitoring function as Filter and airflow supervision, the signal type as Binary switching contact, the measurement principle as Pressure differential, the application system as Ventilation and building services, the process connection as Dual pressure ports, the control role as Pressure status detection, the medium class as Clean gas, and the product lifecycle as Active product.
BEFORE YOU BUY
Confirm the complete Differential pressure switch, 20 to 300 Pa
ACTUAL APPLICATIONS
Application fields for QBM81-3
QBM81-3 is used across compatible installations in the following broad industrial application fields, subject to verified system design and operating requirements.
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01 · HVAC & BUILDING SERVICES
Heating, Ventilation and Building Utility Services
Heating and chilled-water distribution servicesVentilation and indoor-air management -
02 · COMMERCIAL BUILDINGS
Commercial and Institutional Building Operations
Commercial property operationsInstitutional facility services -
03 · PHARMACEUTICALS
Pharmaceutical and Life Science Manufacturing
Pharmaceutical formulation and productionBiotechnology and life science manufacturing
Technical specifications for QBM81-3
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Product ModelQBM81-3
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Product ParametersDifferential pressure switch, 20 to 300 Pa
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In stock1 unit
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ManufacturerSiemens
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Product familyQBM81
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Device typeDifferential pressure switch
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Measured mediumAir and non-aggressive gases
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Pressure range20 to 300 Pa
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Equivalent range0.2 to 3 mbar
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SetpointAdjustable
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Switch functionDifferential pressure switching
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Monitoring functionFilter and airflow supervision
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Signal typeBinary switching contact
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Measurement principlePressure differential
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Application systemVentilation and building services
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Process connectionDual pressure ports
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Control rolePressure status detection
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Medium classClean gas
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Product lifecycleActive product
View all additional
Alternative Names
Siemens Differential pressure switch, 20 to 300 Pa
Siemens QBM81 differential pressure switches
SYSTEM & REPLACEMENT CHECK
Information needed before ordering
Three direct checks to secure your system integration and minimize ordering risks.
Information
System integration
Replacement check
Manuals & support
SYSTEM INTEGRATION
Integrate QBM81-3 Differential pressure switch, 20 to 300 Pa
Use QBM81-3 within the documented Siemens QBM81 differential pressure switches system and keep its Differential pressure switch, 20 to 300 Pa function consistent with the connected control, monitoring or mechanical equipment. The host arrangement should identify the complete device and its intended system role.
Coordinate the field connections, signal references, grounding and control logic with the surrounding equipment. Mechanical orientation, process connections and cable routing should follow the manufacturer arrangement applicable to the installed system.
Complete the associated controller or monitoring configuration before returning the function to service. Review device status and system response under controlled conditions, then retain the final connection and configuration records.
Features:
- Exact model: QBM81-3
- Compatible system: Siemens QBM81 differential pressure switches
- Intended role: Differential pressure switch, 20 to 300 Pa
QBM81-3 should be integrated within the documented Siemens QBM81 differential pressure switches system architecture and retained in the approved project records.
INTERCHANGEABILITY
Check QBM81-3 technical compatibility
Use the complete QBM81-3 order identity when evaluating interchangeability within the Siemens QBM81 differential pressure switches system. Similar appearance or a shared family name does not establish compatibility with the installed hardware and engineering project.
Record the installed position, connector orientation, field wiring, address assignment, communication settings and application configuration before removing the existing unit. Preserve cable labels, shielding arrangements and diagnostic records needed to reproduce the documented system state.
After fitting the selected unit, restore the approved configuration and review controller or device diagnostics before enabling the affected function. Confirm the connected signals and controlled response through the established commissioning procedure, then update the maintenance record.
Features:
- Complete identity: QBM81-3
- System compatibility: Siemens QBM81 differential pressure switches
- Configuration and connection records retained
Interchangeability for QBM81-3 depends on the complete order identity and the documented electrical, signal and platform characteristics.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: The linked files are Amikong-hosted reference documents. Match their product identity and scope to the supplied assembly, and consult the applicable manufacturer instructions before use. Accessories and additional documents are included only when expressly listed in the quotation.
Features:
- Match documents to the complete product identity
- Use the applicable manufacturer family instructions
- Additional documents are supplied only when quoted
Documentation for QBM81-3 must be checked against the installed configuration before service.
Also searched as
Important notice
Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION
Commercial terms without hidden steps
Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Shipping & delivery
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DispatchEligible stock: same / next day
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CarriersDHL, FedEx or UPS
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Ship fromXiamen, China
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Product size11.0 × 9.7 × 12.7 cm
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Net weight0.232 kg
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Payment & customs
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PaymentBank transfer (T/T)
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CurrenciesUSD · EUR · GBP · RMB
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Credit cardsNot accepted
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HS reference9026208000
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OriginSwitzerland
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Warranty & returns
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Warranty12 months from AMIKON
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InspectionLabel, condition and packing checks
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ReturnsPrior RMA authorisation required
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CompatibilityConfirm before order
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OEM warrantyDoes not apply
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Part checked
Full suffix recorded -
Condition checked
Label and appearance -
Packing checked
Antistatic protection -
Tracking supplied
Established couriers -
Sandy Lin
Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about QBM81-3
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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What is QBM81-3?
QBM81-3 is a Differential pressure switch, 20 to 300 Pa for the Siemens QBM81 differential pressure switches. -
Which identity must be used when ordering QBM81-3?
Use the complete QBM81-3 marking and compare it with the installed label and project records. -
Can a similar family item replace QBM81-3?
Do not confirm substitution from a family name or similar appearance. Verify the complete code, interfaces, revision and approved configuration. -
What should be recorded before removing QBM81-3?
Record the installed position, connections, cable labels, settings and diagnostic state. -
What should be inspected when QBM81-3 arrives?
Inspect the label, housing, connectors, terminals and packaging for correct identity and condition. -
Which checks follow installation?
Restore the approved configuration and complete controlled power-up, diagnostic and functional tests. -
What information should accompany a quotation?
Provide the complete model, quantity, clear label photographs, destination and required delivery date. -
Which documentation applies?
Use the manufacturer documentation for Siemens QBM81 differential pressure switches and confirm that its scope covers the installed configuration.
READY TO VERIFY YOUR PART?
Get a QBM81-3 quote with price, lead time and revision check.
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