Portable Thermohygrometer Pt100 Delta Ohm HD2301

Achieve laboratory-grade humidity and temperature control anywhere with the Delta Ohm HD2301. This portable thermohygrometer combines Pt100/Pt1000 temperature accuracy with reliable relative humidity measurement in a compact, rugged body. Its large, easy-to-read display and IP67 protection make it ideal for field technicians and quality teams who need fast, stable and traceable readings. Connect a combined RH/T probe to instantly view dew point, absolute humidity (g/m³) and partial vapour pressure (hPa), streamlining on‑site decisions and documentation. With up to 200 hours of autonomy, intuitive keys and built‑in functions such as MAX/MIN/AVG, HOLD and REL, the HD2301 delivers professional performance you can trust.

Key Benefits and Applications

• Precise Pt100 technology – Benefit from platinum resistance sensing for highly stable temperature measurements, essential for audits, calibrations and process checks.
• All‑weather portability – IP67 protection and a robust ABS housing mean dependable operation in plants, labs, warehouses and outdoor surveys.
• Instant psychrometric insights – With a combined RH/T probe connected, the instrument calculates dew point, absolute humidity and vapour pressure for rapid environmental assessments.
• Long battery life – Up to 200 hours on three AA batteries keeps teams productive during multi‑day campaigns or continuous monitoring rounds.
• Fast, confident operation – Large high‑contrast display, dedicated function keys and HOLD/REL shortcuts accelerate measurements and reduce transcription errors.
• Flexible probe ecosystem – Choose from immersion, penetration, air or contact temperature probes, or combined RH/T probes with auto‑recognition to match HVAC, pharmaceutical, museum, food logistics and cleanroom tasks.
• Traceable calibration workflow – Probes with built‑in electronic identification carry their factory calibration, supporting compliant QA documentation and easy probe rotation.

Featured technical specifications

• Measured parameters – Relative humidity, temperature; with RH/T probe connected the instrument displays dew point, absolute humidity in g/m³ and partial vapour pressure in hPa.
• Temperature measurement (Pt100/Pt1000) – Instrument range from −200 °C to +650 °C with 0.1 °C resolution and ±0.1 °C instrument accuracy; compatible with immersion, penetration, air and contact probes.
• Relative humidity measurement – Instrument range from 0 to 100 % RH with 0.1 % RH resolution and ±0.1 % RH instrument accuracy; overall system accuracy depends on the connected probe.
• Probe compatibility – 8‑pole DIN connector for Delta Ohm temperature probes and combined RH/T probes with auto‑detection and factory calibration data stored in the probe.
• User functions – MAX, MIN and AVG statistics, HOLD for screen freeze, REL for relative measurements, and Auto Power Off that can be disabled when required.
• Display – Two‑row, 4½‑digit LCD with clear symbols; visible area approximately 52 × 42 mm for high legibility in the field.
• Protection and build – IP67 ingress protection with durable ABS housing for demanding industrial and outdoor environments.
• Power and autonomy – Three 1.5 V AA batteries with typical autonomy up to 200 hours; ultra‑low standby consumption for battery preservation.
• Operating conditions – Operating temperature from −5 to +50 °C; working humidity from 0 to 90 % RH without condensation; storage from −25 to +65 °C.
• Dimensions and weight – Compact footprint of 140 × 88 × 38 mm and light weight of approximately 160 g including batteries.
• Kit contents and options – Instrument supplied with batteries, manual and case; temperature and combined RH/T probes are ordered separately to suit your application.

Why this thermohygrometer is the perfect choice

Choose the HD2301 at Stratosens.com to pair proven Delta Ohm performance with expert guidance. Our team helps you select the right probe for your process, ensuring accuracy from day one, while Stratosens.com provides professional support, fast fulfilment and a seamless purchasing experience for laboratories, industry and field services alike.