How to Select Thermal Insulation Box for Furnace Temperature Tester

Selection principles: Choose based on furnace temperature, furnace passing duration and tester size. Opt for a slightly higher insulation grade rather than an ill-fitted one.

1. Three Core Selection Parameters

1. Maximum Heat Resistance

SMT reflow soldering / wave soldering (below 260℃): 300℃ grade, cost-effective and lightweight
Painting / powder curing (300~350℃): 400~500℃ grade, 1-2 hour heat resistance
Dacromet coating / Teflon processing / high-temperature heat treatment (500~800℃): 800~1000℃ composite insulation box, 1-4 hour heat resistance
Sintering / enamel processing / metallurgy (over 1000℃): 1000~1200℃ box with nano aerogel and stainless steel shell, 2-6 hour heat resistance

2. Heat Insulation Duration

Formula: Insulation duration ≥ Actual furnace time × 1.3 (30% safety margin)

Example: 1-hour furnace time requires minimum 1.3-hour insulation capacity

Note: Valid duration refers to internal temperature kept below 60~65℃, not shell surface temperature

3. Internal Dimension

Inner length, width and height shall be 5~10mm larger than tester for easy placement and buffer space.

Match sizes for brands including KIC, Datapaq, iBoo and Lucun; original or compatible models are recommended.

2. Material & Structure

Common Types

Economy type: Insulation cotton with metal liner
Applicable for temperature below 260℃ and short testing; service life 1-2 years, prone to deformation
Standard type: Stainless steel clad insulation cotton
Suitable for 300~500℃, 1-2 hour usage; durable and widely adopted
High-end composite type: 310S/Inconel steel + ceramic fiber + nano aerogel
Fit for 800~1200℃, 2-6 hour operation; thin, lightweight and long service life

Key Materials

Shell: 304 stainless steel for regular use; 310S/Inconel for high temperature oxidation resistance
Insulation layer: Ceramic fiber/high silica cotton (below 500℃); nano aerogel (max 1200℃, superior thermal insulation)

3. Quick Selection by Application

SMT reflow soldering (260℃, 30-60min): 300℃/1-hour steel clad box, weight 1-2kg
Powder coating (350℃, 60-90min): 500℃/2-hour composite box, weight 2-3kg
Dacromet & heat treatment (600℃, 60-120min): 800℃/2-hour aerogel box, weight 3-5kg
Sintering & metallurgy (1000℃+, 120-240min): 1200℃/4-hour heavy-duty box, weight 5-10kg

4. Common Selection Mistakes

Ignore duration while only focusing on temperature; capacity varies greatly even at identical temperature grade
Too compact internal size causes inconvenient access
Unqualified cheap products may lead to overheating and equipment damage
Low-grade insulation material ages rapidly under persistent high temperature

Selection Formula

Match temperature grade, reserve extra duration, leave proper inner space, choose materials per working condition; composite structure for extreme heat, steel clad cotton for regular use.

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