Testo 435-1 Multi-Function Measuring Instrument: HVAC and IAQ Assessment, NTC & Thermocouple Compatibility

The Testo 435-1 is a versatile multi-function measuring instrument designed for professionals in HVAC and Indoor Air Quality (IAQ) assessment. It offers compatibility with a range of optional probes, including NTC and thermocouple sensors, enabling precise measurements of air velocity, temperature, humidity, and more. This device is ideal for adjusting and testing ventilation and air conditioning systems, as well as assessing indoor air quality in various environments.

Key Features:

• Versatile Probe Compatibility: Supports a variety of optional probes for measuring air velocity, temperature, humidity, CO₂ levels, and absolute pressure.
• NTC and Thermocouple Support: Compatible with NTC and thermocouple (Type K) sensors for accurate temperature measurements.
• User-Friendly Interface: Features a large, backlit display with easy-to-navigate menus and user profiles tailored for duct and IAQ measurements.
• Dew Point Calculation: Automatically calculates and displays dew point distance, aiding in humidity assessments.
• Min/Max/Mean Value Display: Records and displays minimum, maximum, and mean values for comprehensive data analysis.
• Robust Design: Constructed with a durable housing to withstand demanding field conditions.

Technical Specifications:

• Temperature Measurement (NTC):
  • Range: -50 to +150°C
  • Accuracy: ±0.3°C (-50 to +70°C); ±0.5°C (remaining range)
  • Resolution: 0.1°C
• Temperature Measurement (Thermocouple Type K):
  • Range: -200 to +1370°C
  • Accuracy: ±0.3°C (-60 to +60°C); ±(0.2°C + 0.3% of reading) (remaining range)
  • Resolution: 0.1°C
• Humidity Measurement (with optional probe):
  • Range: 0 to 100% RH
  • Accuracy: ±2% RH (2 to 98% RH)
  • Resolution: 0.1% RH
• CO₂ Measurement (with optional IAQ probe):
  • Range: 0 to 10,000 ppm
  • Accuracy: ±(50 ppm + 2% of reading)
  • Resolution: 1 ppm
• Absolute Pressure Measurement (with optional probe):
  • Range: 0 to 2000 hPa
  • Accuracy: ±3 hPa
  • Resolution: 0.1 hPa
• Dimensions: 220 x 74 x 46 mm
• Weight: Approximately 428 g
• Operating Temperature: -20 to +50°C
• Storage Temperature: -30 to +70°C
• Battery Type: 3 x AA batteries
• Battery Life: Up to 200 hours (typical vane measurement)

Applications:

• HVAC System Testing: Adjust and test ventilation and air conditioning systems to ensure optimal performance.
• Indoor Air Quality Assessment: Measure parameters such as CO₂ levels, humidity, and temperature to evaluate indoor air quality.
• Duct Measurements: Utilize compatible probes to measure air velocity and volumetric flow within ventilation ducts.
• Temperature Monitoring: Employ NTC and thermocouple probes for precise temperature measurements in various settings.