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Recording -4 to 158°F alongside 0 to 100 %RH over Bluetooth, this data logger monitors indoor climate during HVAC/R commissioning. In addition, readout from up to 98.4' (30 m) away reaches sensors mounted in ceilings and ductwork. Free smartphone app configuration and reporting runs on iOS and Android.
Recording -4 to 158°F alongside 0 to 100 %RH over Bluetooth, this data logger monitors indoor climate during HVAC/R commissioning. In addition, readout from up to 98.4' (30 m) away reaches sensors mounted in ceilings and ductwork. Free smartphone app configuration and reporting runs on iOS and Android.
Monitoring a storage room or a plant system starts with a record nobody has to take by hand. This 174 H BT mini data logger records temperature and humidity across -4 to 158°F (-20 to 70°C) and holds 16,000 readings, enough for months of unattended logging.
Readout without disruption
Bluetooth reaches up to 98.4' (30 m), so readings come off the logger without opening a cold room door or reaching a ceiling-mounted sensor. The free testo Smart App on iOS and Android handles configuration, live display and report export.
Nothing lost to a flat battery
Automatic data backup preserves the record when the battery runs down or is changed. A IP20 housing and a wall bracket suit permanent installation, and the black housing distinguishes it at a glance where several loggers are deployed together.
Features
Applications
| Sensor Type | NTC |
| Measuring Range | -4 to 158°F (-20 to 70°C) |
| Accuracy | ±0.9°F (±0.5°C) |
| Resolution | 0.1 °C |
| Humidity Sensor | Testo humidity sensor, capacitive |
| Humidity Measuring Range | 0 to 100 %RH* * Not for condensing atmospheres. For continuous application in high humidity (>80 %RH at ≤86°F (30°C) for >12 hours, >60 %RH at >86°F (30°C) for >12 hours), please contact us. |
| Humidity Accuracy | ±3 %RH (2 to 98 %RH) ±0.03 %RH/K |
| Humidity Resolution | 0.1 %RH |
| Channels | 2 internal |
| Memory | 16,000 measurement value pairs (16,000T + 16,000H) |
| Measuring Rate | 1 minute to 24 hours |
| Operating Temperature | -4 to 158°F (-20 to 70°C) |
| Storage Temperature | -40 to 158°F (-40 to 70°C) |
| Dimensions | 2.4 x 1.5 x 0.7" (60 x 38 x 18.5 mm) |
| Weight | 1.2 oz (35 g) |
| Housing Material | Plastic |
| Protection Class | IP20 |
| Product Colour | Black |
| Battery Type | 2 lithium batteries (CR2032) |
| Battery Life | 1 year (15 minute measuring cycle, 77°F (25°C)) |
| Sensor Type | NTC |
| Measuring Range | -4 to 158°F (-20 to 70°C) |
| Accuracy | ±0.9°F (±0.5°C) |
| Resolution | 0.1 °C |
| Humidity Sensor | Testo humidity sensor, capacitive |
| Humidity Measuring Range | 0 to 100 %RH* * Not for condensing atmospheres. For continuous application in high humidity (>80 %RH at ≤86°F (30°C) for >12 hours, >60 %RH at >86°F (30°C) for >12 hours), please contact us. |
| Humidity Accuracy | ±3 %RH (2 to 98 %RH) ±0.03 %RH/K |
| Humidity Resolution | 0.1 %RH |
| Channels | 2 internal |
| Memory | 16,000 measurement value pairs (16,000T + 16,000H) |
| Measuring Rate | 1 minute to 24 hours |
| Operating Temperature | -4 to 158°F (-20 to 70°C) |
| Storage Temperature | -40 to 158°F (-40 to 70°C) |
| Dimensions | 2.4 x 1.5 x 0.7" (60 x 38 x 18.5 mm) |
| Weight | 1.2 oz (35 g) |
| Housing Material | Plastic |
| Protection Class | IP20 |
| Product Colour | Black |
| Battery Type | 2 lithium batteries (CR2032) |
| Battery Life | 1 year (15 minute measuring cycle, 77°F (25°C)) |
