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Ideal for environmental temperature and relative humidity acquisition, this sensor features a 2-layer filter that protects against dust, soot, and other contaminants. Moreover, this calibratable ±0.18°F (±0.1°C) accuracy sensor operates with the instrument in virtual COM port mode, and the USB port makes it usable in minutes.
Ideal for environmental temperature and relative humidity acquisition, this sensor features a 2-layer filter that protects against dust, soot, and other contaminants. Moreover, this calibratable ±0.18°F (±0.1°C) accuracy sensor operates with the instrument in virtual COM port mode, and the USB port makes it usable in minutes.
The TRH420, a member of the TRH series, is a USB sensor designed for environmental temperature and relative humidity measurements, offering improved precision of ±0.18°F (±0.1°C) for temperature and ±1.5%RH for relative humidity. Its digitally calibrated, linearized, and factory-compensated sensor allows precise and interchangeable measurements, with a probe operating range of 40 to 158°F (-40 to 70°C). With a resolution of 0.027°F (0.015°C) for temperature and 0.01% RH for relative humidity, it is ideally suited for applications requiring precise monitoring of these parameters. Its 1-meter USB cable and USB-powered operation provide excellent installation flexibility, while its robust design protects it against challenging environmental conditions.
Like all Dracal measurement instruments, the TRH420 is compatible with free software tools, making it an essential component of a DAQ solution. For those who wish to integrate the TRH420 into their system, there are two options available: command line tools and VCP mode. If you prefer a graphical interface, DracalView is the appropriate choice.
Features
Applications
| Temperature | |
| Operating Range | -40 to 158°F (-40 to 70°C) |
| Accuracy | -40 to 68°F (-40 to 20°C): Typ.: ±0.36°F (±0.2°C) Maximum: ±0.54°F (±0.3°C) 68 to 140°F (20 to 60°C): Typ.: ±0.18°F (±0.1°C) Maximum: ±0.54°F (±0.3°C) 140 to 158°F (60 to 70°C): Typ.: Typ.: ±0.27°F (±0.15°C) Maximum: ±0.54°F (±0.3°C) -40 to 158°F (-40 to 70°C): Typ.: ±0.36°F (±0.2°C) Maximum: ±0.54°F (±0.3°C) |
| Resolution | Typ.: 0.027°F (0.015°C) |
| Repeatability | Typ.: 0.108°F (0.06°C) |
| Response Time | t63%: 10s |
| Factory Calibrated | Yes, individually |
| Relative Humidity | |
| Operating Range | 0 to 100% RH, non-condensing |
| Accuracy | 0 to 80% RH at 77°F (25°C): Typ.: ±1.5% RH Maximum: ±2% RH 80 to 100 % RH at 77°F (25°C): Typ.: ±2% RH Maximum: ±3% RH 0 to 80% RH from 50 to 122°F (10 to 50°C): Typ.: ±1.5% RH Maximum: ±2% RH 0 to 100% RH from 32 to 158°F (0 to 70°C): Typ.: ±2% RH Maximum: ±3% RH |
| Resolution | Typ.: 0.01% RH |
| Hysteresis | At 77°F (25°C): 0.8% RH |
| Factory Calibrated | Yes, individually |
| Probe | |
| Operating Range | -40 to 158°F (-40 to 70°C) |
| Cable | Material: PVC Length: 3' (1 m) |
| Filters | Material: Layer 1: Polyethylene terephthalate (PET) mesh Layer 2: PTFE membrane Efficiency: 99.99% for particle size ≥200 nm |
| Housing and USB cable | |
| Operating Range | Temperature: 32 to 158°F (0 to 70°C) Humidity: 10 to 90% RH, non condensing |
| Material | ABS |
| IP Rating | 51 |
| USB Cable Length | 3' (1 m) |
| General Specifications | |
| Voltage | Powered through a USB port, 5 V |
| Current Consumption | ≤18 mA at 5V |
| Colour | Cyan |
| ADC Resolution | 16 bits |
| Long-Term Stability | Yes |
| Temperature Compensated | Yes, by the manufacturer |
| Lifetime | 5 years |
| Weight | 1.41 oz (40 g), without USB cable |
| Temperature | |
| Operating Range | -40 to 158°F (-40 to 70°C) |
| Accuracy | -40 to 68°F (-40 to 20°C): Typ.: ±0.36°F (±0.2°C) Maximum: ±0.54°F (±0.3°C) 68 to 140°F (20 to 60°C): Typ.: ±0.18°F (±0.1°C) Maximum: ±0.54°F (±0.3°C) 140 to 158°F (60 to 70°C): Typ.: Typ.: ±0.27°F (±0.15°C) Maximum: ±0.54°F (±0.3°C) -40 to 158°F (-40 to 70°C): Typ.: ±0.36°F (±0.2°C) Maximum: ±0.54°F (±0.3°C) |
| Resolution | Typ.: 0.027°F (0.015°C) |
| Repeatability | Typ.: 0.108°F (0.06°C) |
| Response Time | t63%: 10s |
| Factory Calibrated | Yes, individually |
| Relative Humidity | |
| Operating Range | 0 to 100% RH, non-condensing |
| Accuracy | 0 to 80% RH at 77°F (25°C): Typ.: ±1.5% RH Maximum: ±2% RH 80 to 100 % RH at 77°F (25°C): Typ.: ±2% RH Maximum: ±3% RH 0 to 80% RH from 50 to 122°F (10 to 50°C): Typ.: ±1.5% RH Maximum: ±2% RH 0 to 100% RH from 32 to 158°F (0 to 70°C): Typ.: ±2% RH Maximum: ±3% RH |
| Resolution | Typ.: 0.01% RH |
| Hysteresis | At 77°F (25°C): 0.8% RH |
| Factory Calibrated | Yes, individually |
| Probe | |
| Operating Range | -40 to 158°F (-40 to 70°C) |
| Cable | Material: PVC Length: 3' (1 m) |
| Filters | Material: Layer 1: Polyethylene terephthalate (PET) mesh Layer 2: PTFE membrane Efficiency: 99.99% for particle size ≥200 nm |
| Housing and USB cable | |
| Operating Range | Temperature: 32 to 158°F (0 to 70°C) Humidity: 10 to 90% RH, non condensing |
| Material | ABS |
| IP Rating | 51 |
| USB Cable Length | 3' (1 m) |
| General Specifications | |
| Voltage | Powered through a USB port, 5 V |
| Current Consumption | ≤18 mA at 5V |
| Colour | Cyan |
| ADC Resolution | 16 bits |
| Long-Term Stability | Yes |
| Temperature Compensated | Yes, by the manufacturer |
| Lifetime | 5 years |
| Weight | 1.41 oz (40 g), without USB cable |
