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『Inline Flow Meter Fire Hose: Portable High-GPM Lightweight Testing Sensors for Fire Department Hydraulics』Related information(v cone flow meter|rotary gas meter|gallon meter|gear meter|metal tube rotameter|glass tube rotameter|nutating disk meter|transit time ultrasonic flow meter|wedge flow meter|pd meters|hydraulic flow meter|ultrasonic water flow meter|water flow meter|air flow meter|magnetic water flow meter|oxygen flow meter|gas flow meter|argon flow meter|air velocity meter|gasoline flow meter|fuel flow meter|ultrasonic water meter|digital water meter|nitrogen flow meter|solid flow meter|Oxygen tank flow meter|digital water flow meter|diesel fuel flow meter|steam flow meter|02 flow meter|compressed air flow meter|oil flow meter|liquid flow meter)
Inline Flow Meter Fire Hose: Portable High-GPM Lightweight Testing Sensors for Fire Department Hydraulics
Quick Answer
A portable inline flow meter for fire hose testing should measure 150 to 1500 GPM at pressures up to 200 psi. Silver Automation Instruments builds lightweight electromagnetic inline flow meters with DN50 to DN200 bodies and common fire hose couplings. Accuracy is within 0.5 percent of reading. Send us your hose size, GPM range, and pressure to get a specific offer.
Why Fire Department Hydraulics Needs Inline Flow Testing
Fire pump tests often look at pressure only. Flow is the number that tells you if the pumper can actually deliver water. A fire department in Malaysia found a 12 percent drop in pump output during a monthly test. The panel gauge looked normal. The flow sensor caught the problem. That is why inline flow metering matters.
Most engineers skip this part. They trust the pump curve. But a hose lay with old couplings and soft hoses changes the actual flow. An inline meter removes the guess. We have seen this pattern on customer sites many times. A customer in Vietnam asked us last year for a portable meter to test a 6 inch suction hose before a new station went into service.
NFPA 1911 tests require flow checks at 100 percent, 70 percent, and 50 percent of rated pump capacity. The inline meter logs all three points. Without a known flow rate, you cannot prove the pumper meets its rated output.
What to Specify for a Fire Hose Inline Flow Meter
Buyers should ask for GPM range, display logging, battery life, hose connection type, and pressure rating. For fire department use we recommend an electromagnetic inline flow sensor with no moving parts. Sand and rust from hydrant water do not stop it. Body material 316L stainless steel or aluminum works for portable skid tests.
Common sizes are DN50 for 2 inch hose, DN80 for 3 inch hose, DN100 for 4 inch hose, and DN150 for 6 inch hose. The flow range depends on your target. A 4 inch hose test usually runs from 400 to 1000 GPM. A 6 inch suction test can reach 1500 GPM. Specify Storz, camlock, or NH threaded couplings. Do not assume one coupling fits all trucks. Water temperature above 40 °C may need a different liner. Standard EPDM works up to 80 °C.
Portable High-GPM Lightweight Flow Meter Build Details
We build these sensors for field use. The sensor with a DN100 aluminum spool weighs under 6 kg. The converter adds about 1.2 kg. A firefighter can carry the whole kit in one hand. The housing is IP67. The meter runs on a 24 V DC battery pack or a 12 V vehicle supply. The display shows GPM, total gallons, and pressure if you add an external pressure transmitter.
In practice most fire crews in Southeast Asia test at 500 to 1000 GPM. The DN100 and DN150 sizes cover that range. The meter outputs 4-20 mA, pulse, and RS485 Modbus RTU. Optional 4-20 mA HART is available for departments that tie into SCADA or telemetry. The
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Recommended Silver Instruments Flow Meter Options
Silver Automation Instruments supplies three inline meter options for fire service. The full bore electromagnetic model covers DN50 to DN200 and flow up to 2000 GPM. The insertion electromagnetic model works for larger suction lines from DN200 to DN600. The battery powered ultrasonic clamp-on meter works for quick checks without cutting hose. Most departments start with the full bore electromagnetic meter because this model handles dirty water well and needs no maintenance.
Installation Notes for Fire Ground Use
Keep the meter at least 5 DN of straight run upstream and 2 DN downstream when you can. On a fire ground you may not have perfect straight pipe. The meter still gives repeatable readings if you avoid elbows immediately before the sensor. Use camlock or Storz adapters to connect to a 2.5 inch or 4 inch hose. Drain the meter after use. Rust and standing water shorten the liner life.
Do not drop the converter. Portable fire equipment takes abuse. Store the meter in its foam case when the meter is not on the truck. Check the battery before a pump test. A dead battery is the most common issue we hear about from fire departments in Latin America.
Five FAQ for Fire Hose Inline Flow Meters
What flow range do I need for fire hose testing?
For 2.5 inch hose specify 200 to 600 GPM. For 4 inch hose specify 400 to 1000 GPM. For 6 inch suction specify 800 to 1500 GPM. Tell us your pump rating and we will match the meter size.
Can I use this inline flow meter on saltwater or foam?
Yes. The electromagnetic liner and electrode materials handle seawater and AFFF foam. Specify 316L electrodes and PTFE or EPDM liner. Avoid aluminum spools for saltwater. Use stainless steel spools.
Does the meter need external power?
No. Each portable meter can run from a battery pack or a 12 to 24 V DC supply. The battery pack lasts 10 to 12 hours at continuous flow.
What outputs work with a fire department data logger?
Use pulse output for total gallons and 4-20 mA for flow rate. RS485 Modbus RTU gives both values on one cable. We can set the ranges before shipping.
How fast can Silver Automation Instruments ship to Southeast Asia or South America?
Standard portable meters ship in 7 to 10 days after we confirm the coupling type and flow range. Express shipping to Malaysia, Chile, Vietnam, Saudi Arabia, or Mexico usually takes 4 to 6 business days.
Contact Silver Automation Instruments
For a quotation send your hose size, flow range in GPM or L/s, pressure in bar or psi, pipe size in DN, coupling type, and water temperature in °C if the temperature is above 40 °C. Visit flow-meter.com.au and use the contact page. Tel: +86-135-1213-1526. Whatsapp: 86-135-12131526. WeChat: +86 13512131526. We respond within 12 hours on business days.