1 m. Fiem wet bulb humidity reading wick (muslin stocking, moistening cloth)

Reference: 28 - Brand: FIEM
€2.44
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Wet Bulb Hygrometer Wick (1 meter) – Special replacement muslin wick for wet bulb hygrometers. Cotton material that wraps around the thermometer bulb and allows for precise measurement of relative humidity through evaporation. This consumable item requires frequent replacement to maintain accurate readings.

A customer wrote to me: "The wet-bulb hygrometer always read 100% even when the incubator was dry. I replaced the sock, which was encrusted with limescale and dirt, and now it works perfectly again. My mistake: I was using tap water instead of distilled water."

⚠️ CAUTION - CRITICAL MAINTENANCE: The muslin sock is the most important component for the proper functioning of the wet bulb hygrometer. It MUST be replaced frequently and ALWAYS kept moist with distilled water. A dirty, dry, or mineral-encrusted sock will cause completely incorrect readings.

When to replace: With each new batch of eggs, when the sock appears dirty/yellowish, if there are white scale deposits, when the readings are unstable or stuck at 100%, or if the sock no longer absorbs water well. ALWAYS use distilled or demineralized water to avoid mineral deposits.

What's included: 1 meter of cotton muslin wick, enough for several refills. Cut to the length needed to completely wrap the thermometer bulb.

Basic rules: The sock must always be kept moist, use only distilled water, tighten it well around the bulb, make sure it sits properly in the water tank.

💰 Price: €2.00/meter (VAT excluded, shipping excluded) – FIEM COMO WAREHOUSE – Padovan Avicoltura: original spare parts for precision instruments.

Compatibility: FIEM HNB wet bulb hygrometer and Fiem thermohygrometer

📦 Logistics: Dispatch within 1 business day, delivery within 2-4 days. Warranty: Consumable product.

💡 More info? Read the description below.

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The minimum purchase order quantity for the product is 2.

  SECURE PAYMENT METHODS

Cash on delivery, PayPal, credit card, in 3 installments, Satispay, bank transfer, Postepay top-up.

  SHIPPING COSTS

Italy offers free shipping on orders over €190. For smaller orders, shipping is €14.70 (place one order per Fiem-Borotto-River brand). European Union shipping is always €30.

  Free Consultation

Pre-purchase assistance to help you choose the product best suited to your needs, post-purchase support with usage advice and help finding spare parts.

SPEDIZIONE A COSTO FISSO

Con ordini superiori a 190 euro, la spedizione è gratuita! Per importi inferiori, la tariffa fissa di una singola spedizione è solo 14,70 euro.

Wet Bulb Hygrometer Wick (1 meter) – Complete Data Sheet


📦 Product information

Item code: 28 (HNB-K)

Italian name: Wet bulb humidity reading wick

English name: Wet Bulb Hygrometer Wick / Muslin Cloth

Material: Cotton muslin

Length: 1 meter (can be cut to size)

Compatibility: FIEM HNB wet bulb hygrometer + Fiem thermohygrometer

⚠️ CRITICAL COMPONENT - MANDATORY FREQUENT MAINTENANCE:

The muslin sock is the heart of the wet-bulb hygrometer's measurement system. A dirty, dry, or crusted sock makes humidity readings COMPLETELY UNRELIABLE , compromising the entire incubation.

Replace at each new incubation cycle!

🔍 What is the wick and why is it essential?

The wick (or muslin stocking) is the cotton fabric that wraps the thermometer bulb in a wet-bulb hygrometer. Its function is:

  1. Absorb water from the tank through capillarity
  2. Keep the thermometer bulb constantly moist
  3. Allow evaporation which cools the bulb
  4. Allow measurement of relative humidity

Principle: Water evaporates from the damp sock → the bulb cools → the temperature difference indicates humidity. If the sock malfunctions, the entire system is compromised.

⚠️ WHY FREQUENT REPLACEMENT IS ESSENTIAL

What happens with an old/dirty sock:

  • Limescale Deposits: Tap water leaves behind minerals that clog fibers.
  • Organic contamination: Algae, bacteria, mold grow in moist tissue
  • Loss of capillary action: Cotton no longer absorbs water properly
  • Incorrect readings: The hygrometer reads 100% (dry sock)
  • Delay in response: Humidity changes are not detected

Consequences for incubation:

  • You think the humidity is correct when it isn't.
  • Eggs too dry → air chamber too large → weak chicks
  • Eggs too moist → small air chamber → drowning during hatching
  • Drastically reduced hatchability

📋 When to replace the sock

✅ ALWAYS replace:

  • Optimal At each new incubation cycle/batch
  • When it appears dirty, yellowish or dark
  • If there are visible white deposits (limescale)
  • When readings are unstable or stuck at 100%
  • If the sock no longer absorbs water well
  • After prolonged periods of non-use

🔧 Replacement instructions

Necessary material

  • New wick (cut ~5-8 cm from the spool)
  • Distilled or demineralized water
  • Clean scissors

Procedure

  1. Remove the old sock: Unscrew it or gently slide it off the bulb
  2. Cut the new wick: Long enough to wrap around the bulb + draw into the reservoir
  3. Wrap the bulb: The sock must completely cover the thermometer bulb
  4. Tighten well: There should be no air spaces between the sock and the bulb
  5. Place in the tank: The free end should be sticking out of the water
  6. Fill with distilled water: The tank must be at least 1/3 full
  7. Wet the sock: The first time, moisten it manually
  8. Wait for stabilization: 30-60 minutes before the first reading

💧 DISTILLED WATER: MANDATORY

ALWAYS USE DISTILLED OR DEMINERALIZED WATER!

Tap water contains minerals (calcium, magnesium) that:

  • They settle on the sock forming white crusts
  • They clog the cotton fibers
  • They reduce capillarity (absorption)
  • They drastically shorten the life of the sock
  • They cause incorrect readings

With distilled water the sock lasts 3-4 times longer!

⚠️ Common mistakes to avoid

  1. Touch the sock with your fingers frequently: Skin oil contaminates the fibers and prevents proper absorption.
  2. Use tap water: Minerals quickly encrust the sock
  3. Sock too dry: If the tank is empty, readings impossible
  4. Empty tank: Always check the water level
  5. Never change the sock: After weeks it becomes unusable

🔧 Maintenance during use

Daily checks:

  • Make sure the tank is at least 1/3 full
  • Check that the sock is visibly damp
  • Make sure it fishes properly in the water

Weekly checks:

  • Inspect the sock for dirt or deposits
  • Change the water in the tank
  • Evaluate whether it is time to replace the sock

💡 Advice from 45 years of experience: It's better to change the sock one too many than one too few. The cost is minimal (€2/meter = several replacements), but the risk of losing an entire brood due to incorrect readings is very high.

📊 Technical specifications

Characteristic Value
Material 100% cotton muslin
Length 1 meter (cuttable)
Color Natural white
Product type Consumable - periodic replacement
Replacement frequency Each incubation cycle
Recommended water Distilled or demineralized

🛒 Commercial information

Price: €2.00 per meter (VAT excluded, shipping excluded)

Yield: 1 meter = approximately 10-15 refills (depends on the length needed)

FIEM COMO WAREHOUSE – Padovan Avicoltura: original spare parts for precision instruments.

💡 Related products

  • HNB Wet Bulb Hygrometer – Complete Instrument with Sock Included
  • Analog Thermometer °F (0.5/A) – Temperature Control
  • Thermohygrometer
  • IGR.PARETE 70 Hair Hygrometer – Maintenance-Free Water Alternative

📦 Logistics and times

  • Shipping: 1 business day
  • Delivery: 2-4 working days
  • Departure: FIEM Como Warehouse
  • Packaging: Protective bag

✅ Guarantee

❓ Frequently Asked Questions (FAQ)

Q: How long does a sock last?
A: With proper use and distilled water, 2 months

Q: Can I wash the sock instead of replacing it?
A: Not recommended. Washing doesn't remove mineral deposits within the fibers, and the soap contaminates the cotton. It only costs €2/meter, so it's best to replace.

Q: Do I have to use distilled water?
A: Highly recommended. Tap water deposits limescale, which quickly ruins the sock and causes inaccurate readings.

Q: The hygrometer always reads 100%. Why?
A: The sock is dry, dirty, or no longer absorbent. Replace it and use distilled water.

Q: How many refills do I get from 1 meter?
A: About 10-15 pieces, depending on the length you need for your hygrometer (typically 5-8 cm per spare).

📞 Need help?

🛒 Order now or ask for information

📞 WhatsApp 351 881 9586
📧 Email: info@padovanavicoltura.it


📋 Legal Notice and Rights

© 2025 Padovan Avicoltura. All rights reserved.
PLAGIARISM PROHIBITED: Total or partial reproduction of this text/data on other websites is monitored and will be legally prosecuted (DMCA and Law 633/41) without notice.

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