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Johnson Controls Flow Meter Catalog: Inline and Clamp-On Ultrasonic BTU Meters for Commercial HVAC Automation
Quick Answer: Silver Instruments supplies inline and clamp-on ultrasonic BTU meters for commercial HVAC automation. The meters cover pipe sizes from DN15 to DN600 and support BACnet MS/TP, Modbus RTU, 4-20 mA, and pulse outputs. Send your pipe size (DN), temperature range (°C), and flow range for a quote.
If you are reviewing the Johnson Controls Flow Meter Catalog for commercial HVAC automation, the inline and clamp-on ultrasonic BTU meter families are likely on your list. Silver Automation Instruments manufactures a similar range for chilled water, hot water, and condenser water measurement. The meters calculate thermal energy from flow rate and temperature difference. You get kWh, BTU, or MJ on the local display. A building automation system can read the data over BACnet MS/TP or Modbus RTU.
Inline Ultrasonic BTU Meters for HVAC Chilled Water and Hot Water Loops
Inline models install directly into the pipe. They work from DN15 to DN200 in most commercial projects. The flow tube has no moving parts. Two PT100 or PT1000 temperature sensors measure supply and return temperatures. The transmitter computes energy based on flow rate and delta T. Typical accuracy is ±1.0 percent of reading for flow and ±0.5 °C for temperature. Common outputs include 4-20 mA, pulse, and RS485. We recommend inline meters for new chiller plants, AHU coil balance, and district cooling sub-metering.
Clamp-On Ultrasonic BTU Meters for Retrofit and Data Center Cooling
Clamp-on BTU meters do not require pipe cutting. The transducers mount on the outside of the pipe wall. Pipe sizes from DN25 to DN300 are standard. You can also order larger clamps for DN350 to DN600 if needed. This type works well for retrofit projects in hospitals, shopping malls, and data centers where shutdown is expensive. Accuracy depends on pipe material and flow profile. For steel, copper, and PVC pipes with clean water, expect ±1.5 to ±2.0 percent of reading. We have seen many customers in Southeast Asia use clamp-on meters for temporary energy audits on chilled water lines.
Signal Output and Integration with Building Automation Systems
Most HVAC automation projects need BACnet MS/TP or Modbus RTU. Our BTU meters support both protocols. You can also get 4-20 mA, 2-10 V, pulse, and relay outputs for alarms. The registers for energy, flow, supply temperature, and return temperature are documented in a standard Modbus map. We can provide a BACnet object list for commissioning. A customer in Australia integrated our inline meters into a Schneider Electric BAS for a regional shopping centre. The integration took less than one day because the Modbus map was clear.
Inline vs Clamp-On: Selection Rules for HVAC Engineers
Use inline meters when you have a new installation or a planned shutdown. The flow profile is more controlled. Accuracy is slightly better.
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Field Notes from Commercial HVAC Projects
Last year a customer in Vietnam asked us for 12 clamp-on BTU meters for a bakery cooling system. The pipes were DN65 and DN80. The building was running 24 hours per day. Shutdown was not allowed. They installed the clamp-on transducers in about 15 minutes per meter. The control system read energy data through Modbus RTU. Another project in the Middle East used inline meters on DN100 chilled water lines for a hotel. The local contractor needed ATEX Zone 2 rating for a plant room with refrigerant adjacent. We supplied a non-Ex version after confirming the plant room classification. Give us the pipe size, fluid, temperature, and output. We will select the right model.
Pricing and Lead Time for Southeast Asia, Middle East, and Australia
We are a flow meter manufacturer based in China. We ship to Southeast Asia, Oceania, Latin America, Africa, and the Middle East. Inline ultrasonic BTU meters with BACnet output start around 480 USD for DN25. Clamp-on versions start around 650 USD for DN25 to DN100. Lead time is typically 7 to 12 days for standard models. Custom ranges, special cables, or IP68 transducers may add 5 days. We ship by DHL, FedEx, or sea freight depending on quantity. For orders above 20 units we can offer a distributor discount.
FAQ
What is the difference between an inline ultrasonic BTU meter and a clamp-on ultrasonic BTU meter? Inline meters require pipe cutting and direct contact with water. Clamp-on meters sit outside the pipe wall. Inline gives slightly better accuracy. Clamp-on allows installation without shutdown.
Can these meters work with a Johnson Controls BAS? Yes. They support BACnet MS/TP and Modbus RTU. Many Johnson Controls BAS controllers can read Modbus or BACnet points. Confirm controller type before ordering.
What pipe sizes do you cover for commercial HVAC? Inline from DN15 to DN200. Clamp-on from DN25 to DN600. Small sizes DN15 and DN20 are limited to inline models.
What temperature sensors are included? PT100 or PT1000 paired sensors. They measure supply and return lines. Cable length can be ordered up to 30 meters.
How do I request a quote? Send us pipe size (DN), fluid type, flow range (m3/h or gpm), supply and return temperature (°C), output protocol, and installation country. Use email, WhatsApp, or WeChat. We reply within 12 hours.
Silver Automation Instruments
Tel: +86-25-68650347
WhatsApp: +86-25-52155837
WeChat: +86 15365082610
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