"Our job is helping you do your job"
Ideal for environmental atmospheric pressure, temperature, and relative humidity acquisition, this sensor features a 2-layer filter that protects against harsh conditions. Moreover, this calibratable ±0.18°F (±0.1°C) accuracy sensor works with the instrument in virtual COM port mode, and the USB port makes it usable in minutes.
Ideal for environmental atmospheric pressure, temperature, and relative humidity acquisition, this sensor features a 2-layer filter that protects against harsh conditions. Moreover, this calibratable ±0.18°F (±0.1°C) accuracy sensor works with the instrument in virtual COM port mode, and the USB port makes it usable in minutes.
This instrument, a member of the PTH series, is specially designed for environmental data acquisition where improved precision is required. The units are directly interchangeable thanks to a factory-calibrated, linear, and compensated digital sensor. The PTH420 offers a wide measurement range, capable of operating in environments ranging from -40 to 125°F (-40 to 70°C) for temperature and from 0 to 100% RH for relative humidity, with a long-term drift of less than 0.054°F/year (0.03°C/year) for temperature and 0.25% RH/year for relative humidity, ensuring reliable long-term measurements. With its digital sensor and USB connectivity, the PTH420 can capture and record very small temperature and humidity variations, allowing for detailed data analysis that is always harmonized. Furthermore, with its ability to measure atmospheric pressure with an accuracy of ±0.15 kPa, the PTH420 is a valuable tool for applications requiring precise knowledge of atmospheric pressure.
Like all Dracal measurement instruments, the PTH420 is compatible with free software tools, making it an essential component of a DAQ solution. For those who wish to integrate the PTH420 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 (probe) | |
| Operating range | -40 to 158°F (-40 to 70°C) Extended temperature: -45 to 80°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.: ±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 |
| Long-Term Drift | Maximum: <0.054°F/year (<0.03°C/year) |
| Relative Humidity (probe) | |
| 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 |
| Long-Term Drift | Typ. from -40 to 158°F ( -40 to 70°C): <0.25% RH/year |
| Atmospheric Pressure | |
| Sensor Location | Inside the USB interface housing |
| Operating Range | Temperature: -4 to 158°F (-20 to 70°C) Pressure: 45 to 110 kPa, for full accuracy Extended pressure: 1 to 120 kPa, linear range of ADC |
| Accuracy | 70 to 110 kPa at 77°F (25°C): Typ.: ±0.15 kPa 70 to 110 kPa from 50 to 104°F (10 to 40°C): Typ.: ±0.18 kPa 45 to 110 kPa from 32 to 122°F (0 to 50°C): Typ.: ±0.2 kPa |
| Overpressure Limit | Pmax: 600 kPa |
| Altitude Resolution | Approximately 3.94" (10 cm) |
| ADC Resolution | 24 bits |
| Response Time | 0.5 seconds |
| Factory Calibration | Yes, individually |
| Noise | ±0.0012 kPa |
| Long-Term Drift | ±0.1 kPa/year |
| Probe | |
| 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 : -4 to 158°F (-20 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 | At 5V, 15 mA |
| Temperature Compensated | Yes, by the manufacturer |
| Lifetime | 5 years |
| Certification | RoHS3 |
| Temperature (probe) | |
| Operating range | -40 to 158°F (-40 to 70°C) Extended temperature: -45 to 80°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.: ±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 |
| Long-Term Drift | Maximum: <0.054°F/year (<0.03°C/year) |
| Relative Humidity (probe) | |
| 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 |
| Long-Term Drift | Typ. from -40 to 158°F ( -40 to 70°C): <0.25% RH/year |
| Atmospheric Pressure | |
| Sensor Location | Inside the USB interface housing |
| Operating Range | Temperature: -4 to 158°F (-20 to 70°C) Pressure: 45 to 110 kPa, for full accuracy Extended pressure: 1 to 120 kPa, linear range of ADC |
| Accuracy | 70 to 110 kPa at 77°F (25°C): Typ.: ±0.15 kPa 70 to 110 kPa from 50 to 104°F (10 to 40°C): Typ.: ±0.18 kPa 45 to 110 kPa from 32 to 122°F (0 to 50°C): Typ.: ±0.2 kPa |
| Overpressure Limit | Pmax: 600 kPa |
| Altitude Resolution | Approximately 3.94" (10 cm) |
| ADC Resolution | 24 bits |
| Response Time | 0.5 seconds |
| Factory Calibration | Yes, individually |
| Noise | ±0.0012 kPa |
| Long-Term Drift | ±0.1 kPa/year |
| Probe | |
| 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 : -4 to 158°F (-20 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 | At 5V, 15 mA |
| Temperature Compensated | Yes, by the manufacturer |
| Lifetime | 5 years |
| Certification | RoHS3 |
