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SiemensSiemens Room Condition Monitors

Siemens Room Pressure Monitor: +/- 0.50" WC (125 Pa), P1, Terminal Block

The Siemens Room Pressure Monitor (SKU 547-104B, MPN 547-104B) is a room condition monitor with a measurement range of +/- 0.50" WC (125 Pa) and an accuracy of ±0.25% of Full Scale. It operates on 18 to 32V AC…

SKU 3G-OTH-176170

Also listed as: 547104B · 547 104B

Brand
Siemens
Item
Room Pressure Monitor: +/- 0.50" WC
Category
Siemens Room Condition Monitors
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Technical Specifications

Siemens
Manufacturer Part Number
547-104B
Type
P1, Terminal Block
Accuracy
±0.25% of Full Scale
Display Size
2.17 in
Analog Outputs
SPDT Relay
Measurement Range
+/- 0.50" WC (125 Pa)
Operating Voltage
18 to 32V AC
Operating Temperature Range
32°F to 120°F
Operating Humidity - Maximum
95% RH (Non-Condensing)

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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The Siemens Room Pressure Monitor (SKU 547-104B, MPN 547-104B) is a room condition monitor with a measurement range of +/- 0.50" WC (125 Pa) and an accuracy of ±0.25% of Full Scale. It operates on 18 to 32V AC, features a 2.17 in display, and provides an SPDT Relay analog output. Designed for environments with temperatures from 32°F to 120°F and up to 95% RH (non-condensing), this device monitors room pressure conditions.

Frequently Asked Questions

What is the Siemens Room Pressure Monitor 547-104B used for?

The Siemens Room Pressure Monitor 547-104B measures differential room pressure in cleanrooms, labs, and hospitals. It provides a local display and SPDT relay output for alarm or control, ensuring pressure differentials stay within ±0.50" WC (125 Pa) with ±0.25% of Full Scale accuracy.

What are the specifications of the Siemens 547-104B room pressure monitor?

The Siemens 547-104B has a measurement range of ±0.50" WC (125 Pa), accuracy ±0.25% of Full Scale, SPDT relay output, 2.17 in display, and operates on 18 to 32V AC. It works from 32°F to 120°F and up to 95% RH non-condensing.

Where to buy Siemens 547-104B room pressure monitor worldwide?

3G Electric supplies the Siemens 547-104B room pressure monitor worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source genuine Siemens equipment for global industrial applications.

How to install the Siemens 547-104B room pressure monitor?

Mount the Siemens 547-104B on a stable wall near the controlled space. Connect the terminal block to 18 to 32V AC power and wire the SPDT relay for alarm or control. Ensure the pressure ports are correctly plumbed and the unit is level for accurate ±0.25% FS readings.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens siemens room condition monitors. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Differential Pressure Sensor: 1 in wc to 1 in wc, ±0.40% Accuracy, 0 to 10V DC, 4 to 20mA, 100 ohms (MPN 590-780)

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