USB-PTH420
Product Description
PTH420: Precision (±0.1°C/±1.5 %RH) USB temperature, relative humidity and atmospheric pressure sensor.
Part of the PTH series of sensors, the PTH420 is specifically designed to acquire environmental temperature, humidity, and atmospheric pressure (barometric) data where enhanced precision (±0.1°C/±1.5% RH) is required. With its factory calibrated, linearized and temperature compensated digital sensor chip, it is field interchangeable. Thanks to its precision electronics, tiny variations in atmospheric pressure, temperature, and humidity can be acquired using a standard USB port.
The compact probe eases integration, even in space-constrained locations, and the built-in particle filter protects against dust, soot, and other contaminants.
Specifications
Temperature
- Probe operating range:[1] -40°C to 70°C
- Accuracy:
- ±0.1°C (20°C to 60°C)
- ±0.2°C (-40C to 80°C), max ±0.4°C (90°C to 120°C)
- Resolution: 0.015°C (typical)
- Repeatability: 0.06°C (typical)
Relative humidity
- Operating range: 0 to 100 %RH[2]
- Accuracy: (at 25°C)
- Typical accuracy from 0 to 70°C: ±1.5% from 0 to 70 %RH
- Minimum accuracy at 25°C: ±2.0% from 0 to 80 %RH,±3.0% from 90 to 100 %RH
- Resolution: 0.01 %RH (typical)
- Repeatability: 0.1 %RH
Atmospheric (Barometric) Pressure
- Operating range: 1 to 120 kPa (10 to 1200 mbar)
- Accuracy: ±0.15 kPa at 25°C (1.5 mbar)
- Resolution: 0.0065 kPa (0.065 mbar)
- Internal factory calibrated coefficients
- ADC resolution: 24 bits
- Altitude resolution: approx. 10 cm
- Sensor IC: MS5611
External probe
First layer filter
- Material: Polyethylene terephthalate (PET) black mesh
- Mechanical protection
- Large particles protection
Second layer filter
- Material: PTFE membrane
- Efficiency: >=99.99% for particles as small as 200 nm
Miscellaneous
- USB cable length: 1 meter (3 ft)
- Operating temperature ranges (USB cable interface): 0°C to 70°C
- Powered through USB
Available channels
(As displayed in our logging software DracalView)
| Channel Id* | Description | Type | Nature |
|---|---|---|---|
| 00 | MS5611 Pressure | Pressure | Real |
| 01 | SHT31 Temperature | Temperature | Real |
| 02 | SHT31 Relative Humidity | Relative Humidity | Real |
| 03 | Dew point | Dew point | Virtual |
| 04 | Humidex | Humidex | Virtual |
| 05 | Heat index | Heat index | Virtual |
| 06 | Altitude | Height | Virtual |
* Channel Id as it appears in DracalView. Virtual channels Id differs in DracalView and dracal-usb-get.