High-voltage tester CIT21-30S

pressuretemperaturemoisture

Product short description
Bench-top tester for determining upper and lower explosive/combustible concentration limits of flammable vapor–air mixtures under controlled temperature and pressure conditions.

Product description
The CIT21-30S explosive limit tester complies with GB/T 21844-2008 and ASTM E681-04 standards. It measures upper and lower flammability/explosibility limits by preparing mixtures of the test substance with air (or inert diluents when permitted) at a controlled temperature and pressure, applying stirring for homogeneous mixing, and initiating ignition by high-voltage discharge. Combustion events are detected via video monitoring; concentrations are adjusted to locate threshold values. The instrument supports automated sequences, environmental monitoring and post-test cleaning of the vessel.

Product features

• Embedded processor with Windows CE operating system
• 8-inch LCD touchscreen for real-time test status display
• Optional 5 L or 12 L circular glass test vessel
• Explosion pressure-relief devices (door and spring-loaded relief)
• Heating and cooling with air-circulating temperature control
• High-precision humidity module for vessel humidity measurement
• Combined pressure & humidity sensors and thermocouples for sample and environment monitoring with automatic recording of temperature, humidity and atmospheric pressure
• High-precision pressure sensor for accurate gas partial-pressure (concentration) control
• Magnetic stirring, remote start, and automatic ignition control with precise timing
• Internal gas extraction and automatic cleaning of combustion residues from the vessel
• Supplied bottle brush and wash materials (water with sand + detergent) for removing wall-adhered residues
• Double-glass observation window, protective door and anti-fog rear door for safe observation
• Double interlock safety: ignition disabled if door is open or temperature not reached
• Integrated video surveillance system for process recording and playback
• Fully automated test sequences with parameter setting, data storage and report viewing

Technical specifications

• Operating environment: 5 °C ~ 30 °C, <85% RH
• Test object: gas or gasified solid/liquid
• Temperature range: -5 °C ~ 180 °C
• Temperature accuracy: ±1 °C
• Sample temperature measuring range: -50 ~ 300 °C
• Sample temperature resolution: 0.1 °C
• Sample temperature accuracy: ±1 °C
• Pressure measuring range: 0 ~ 110 kPa
• Pressure measurement accuracy: ±0.1% FS
• Reaction vessel humidity measuring range: 0 ~ 100% RH
• Reaction vessel humidity accuracy: ±1.0% RH
• Ambient temperature measurement range: -10 °C ~ +60 °C
• Ambient temperature accuracy: ±0.5 °C
• Humidity measuring range: 5 ~ 95% RH
• Humidity measurement accuracy: ±3.0% RH
• Ambient atmospheric pressure measurement range: 60 ~ 110 kPa
• Ambient atmospheric pressure accuracy: ±0.5 kPa
• Achievable vacuum: ≤1.33 kPa
• Leak rate: ≤0.1 kPa/min
• Ignition spark gap: 6.4 mm
• Ignition duration: 0.2 s ~ 0.4 s
• 5 L glass vessel dimensions: diameter approx. 222 mm, height approx. 305 mm
• 12 L glass vessel dimensions: diameter approx. 295 mm, height approx. 378 mm
• Stirrer speed: ≥400 rpm