HTS-2 precision sensor for temperature, humidity and barometric pressure with RS485 and SDi12 output

HT(B)S-2 – High-precision temperature, humidity and pressure sensor

Precision that lasts. Energy that saves.Reliable climate data

The HT(B)SThe -2 is a high-precision and extremely energy-efficient multi-sensor designed for professional meteorological applications, environmental measurements, and demanding long-term projects. It combines temperature, humidity, and barometric pressure measurement in a robust, anodized aluminum housing and delivers reliable data even under extreme environmental conditions.

Precise measurements – ready for use anywhere

Using state-of-the-art sensor principles – including a capacitive humidity sensor, a high-resolution MEMS pressure sensor and a band-gap temperature sensor – the HT(B) achievesS-2 Measurement accuracies that will convince even professional weather stations and research institutions.
• Temperature accuracy up to ±0.1°C
• Humidity accuracy ±1 %RH (typ.)
• Pressure accuracy up to ±0.004 hPa in the relevant range

Physical calibration

Each HT(B)SThe -2 is individually calibrated – not by mass adjustment, but using actual physical reference standards. Temperature and humidity are measured. under precisely regulated comparison conditions Checked at several points to ensure maximum accuracy.

Energy efficiency at the highest level

Thanks to intelligent energy management, the sensor operates in sleep mode using only 14 µA – Ideal for battery-powered measuring systems, solar applications, or remote measuring points. Even in continuous operation, it requires only 0.6 mA at 12 V. 

Flexible integration into measurement systems

The HT(B)S-2 can be seamlessly integrated into existing infrastructure:
• RS-485, SDI-12 or USB
• Supports Modbus RTU/ASCII and SDI-12
• Measurement and output intervals freely configurable

• RS-485
  • Up to 115,200 baud
  • Supported Modbus RTU, Modbus ASCII, ASCII-Stream
  • Ideal for long lines, bus operation, industrial integration

• SDI-12
  • Also supports ASCII output
  • Compatible with standard measurement networks

• USB-C (CDC / Virtual COM-Port)
  • For configuration, live readout
  • Supports data streaming and batch logging on the PC
  • User-friendly, no special interface required.

Robustly built for the real world

The compact housing (Ø20 mm × 130 mm) is made of anodized aluminum and according to IP65 Protected. A high-quality stainless steel filter (1.4404) protects the sensor from dirt and moisture without affecting the response time. This makes the sensor perfectly suited for stationary and mobile measuring systems in demanding environments.

Other special features:

• ESD protection up to 15 kV on all data lines – ideal for field applications
• Output intervals freely selectable: 1 second to 24 hours
• All settings persist: remain even after power loss
• ASCII streaming modeSensor data is continuously transmitted – perfect for live data acquisition.

1. RS-485
   • Up to 115,200 baud
   • Supported Modbus RTU, Modbus ASCII, ASCII-Stream
   • Ideal for long lines, bus operation, industrial integration

1. RS-232
   • Also up to 115,200 baud
   • Same protocols as RS-485
   • Simple point-to-point communication, for example with data loggers

1. SDI-12
   • Also supports ASCII output
   • Compatible with standard measurement networks

1. USB-C (CDC / Virtual COM-Port)
   • For configuration, live readout
   • Supports data streaming and batch logging on the PC
   • User-friendly, no special interface required.

Other special features:

• ESD protection up to 15 kV on all data lines – ideal for field applications
• Output intervals freely selectable: 1 second to 24 hours
• All settings persist: remain even after power loss
• ASCII streaming modeSensor data is continuously transmitted – perfect for live data acquisition.