Summer brings high temperatures, humidity, heavy rainfall, and frequent thunderstorms, all of which can significantly increase the failure rate of industrial instrumentation systems.
Common summer issues include:
- transmitter zero drift
- moisture ingress
- overheating of electronic components
- lightning damage
- impulse line vapor lock
- unstable pneumatic air supply
- false level readings caused by vapor interference
To ensure stable plant operation, regular inspection and preventive maintenance become especially critical during this season.
This guide summarizes the most important inspection points for industrial instruments during summer operation.
1. General Environmental Inspection
The first step is to check the overall environmental conditions around the instruments.
Surface Temperature Check
Inspect whether transmitters, valve positioners, solenoid valves, and junction boxes are overheating.
Common causes include:
- direct sunlight exposure
- installation close to hot pipelines
- heat tracing left active
- poor cabinet ventilation
Excessive temperature may cause:
- signal drift
- LCD display blackout
- electronic aging
- unstable communication
Installing a sunshade cover is strongly recommended for outdoor instruments.
2. Moisture, Rain, and Condensation Protection
Summer humidity is one of the most common causes of field failures.
Inspection points:
- cable glands properly tightened
- junction box covers fully sealed
- presence of water or condensation inside terminal boxes
- drainage around field cabinets
Moisture may lead to:
- short circuits
- terminal corrosion
- signal fluctuations
- communication failure
3. Pressure Instrument Inspection
Pressure transmitters and gauges are highly affected by summer temperature changes.
Vapor Lock in Impulse Lines
For volatile media such as:
- gasoline
- LPG
- ammonia solution
- hot water
- condensate
high temperature may cause vaporization inside the impulse line.
This often results in:
- unstable readings
- zero shift
- no signal output
Inspection should focus on:
- condensate pots
- impulse line blockage
- root valve leakage
- manifold valve sealing
4. Flow Meter Inspection
This section is highly valuable for your business because it naturally links to your products.
Electromagnetic Flow Meter
Summer inspection points include:
- grounding condition
- cable sealing
- sensor insulation
- electrode moisture protection
Humidity may cause:
- full-scale false reading
- unstable signal
- display blackout
For outdoor applications, we recommend:
- split type installation
- IP68 sensor protection
- proper grounding ring
- waterproof cable glands
This is a strong point to naturally introduce your electromagnetic flow meters.
Vortex and Mass Flow Meters
Check for:
- probe drift
- pipeline vibration
- thermal expansion stress
- compensation accuracy
For gas measurement, verify whether temperature and pressure compensation are functioning properly.
5. Level Instrument Inspection
This section is extremely useful for radar level meter promotion.
Radar Level Meter False Echo During Summer
High summer temperatures may create:
- vapor layers
- condensation
- foam
- antenna buildup
These conditions often cause:
- false echo
- unstable level reading
- ghost level alarm
Inspection points:
- antenna cleanliness
- moisture on antenna surface
- purge air system
- flange sealing
This section is highly suitable for introducing your 80GHz radar level transmitters.
6. Control Valve and Positioner Inspection
Summer is the peak season for pneumatic valve failures.
Key inspection points:
- positioner overheating
- water in air supply
- slow response
- valve stem sticking
- packing leakage
Pay special attention to:
- air filter regulator drainage
- compressor condensate
- air tank water discharge
7. Instrument Air System Inspection
This part is very professional and customers will trust this immediately.
The most critical issue in summer is:
water in instrument air lines
This may cause plant-wide instability.
Inspect:
- air dryer
- filter separator
- air receiver drainage
- pressure stability (0.4–0.7 MPa)
8. Lightning Protection
Summer thunderstorms are a major risk for field transmitters.
Inspection points:
- grounding resistance
- surge protection modules
- signal line SPD
- control cabinet earth bonding
Lightning damage commonly affects:
- transmitters
- PLC cards
- safety barriers
- communication modules
9. Recommended Preventive Actions
We strongly recommend increasing inspection frequency for:
- distillation units
- tank farms
- gasification systems
- boiler rooms
- outdoor pipelines
Critical inspection frequency:
once per shift during extreme summer weather
10. Final Recommendation
If your plant is facing issues such as:
- signal drift
- unstable level reading
- false alarms
- valve hunting
- moisture ingress
our engineering team can help recommend suitable:
- pressure transmitters
- electromagnetic flow meters
- radar level meters
- control valve positioners
for high-temperature and high-humidity summer applications.