Sensors that never
lose track.
SIM&TECH designs and builds connected devices for industry: from cold‑chain temperature monitoring to embedded diagnostics. Our first product, the EnviroLog‑C250‑TH, logs every variation — no cable, no compromise.
One expertise, four fields of action
From refrigerated warehouses to operating rooms, our sensors adapt to the constraints of each sector — precision, autonomy, traceability.
Logistics
Cold chain, warehouses, transport of sensitive goods — continuous temperature traceability.
Medical
Vaccine and sample storage, device monitoring — reliable, time‑stamped data.
Automotive
Embedded diagnostics, cabin and cargo monitoring — readings you can act on in the workshop.
Consumer
Smart home, comfort and air quality — the same rigor, in a compact format.
EnviroLog‑C250‑TH
A high‑accuracy temperature and humidity data logger that plugs directly into USB‑C, no cable required. It stores up to 250,000 time‑stamped readings and is configured through the LogNex companion app. The ‑ISO variant ships with an individual calibration certificate for the Sensirion sensor, issued by an accredited laboratory.
| Measurement range | ‑20 °C to +60 °C · 0 to 100 % RH |
| Accuracy | ±0.2 °C (0–60 °C) · ±1.8 % RH (30–70 %) |
| Long‑term drift | < 0.03 °C/year · < 0.2 % RH/year |
| Memory | Up to 250,000 readings (T° + RH) |
| Logging rate | 1 second to 18 hours |
| Connection | Direct USB‑C, cable‑free |
| Battery | Rechargeable lithium, up to 550 cycles |
| Dimensions | 71 × 22 × 19 mm |
| Protection | Optional IP65 |
- Calibration & traceability — individual certificate available on the ‑ISO variant
- Sensor selected for low drift and long‑term stability
Built to last, engineered for industry
Every technical choice answers a real‑world constraint: battery life, resilience to power loss, ease of deployment.
Robust firmware
Bare‑metal development, STOP2 power management for extended battery life in the field.
Resilient storage
Custom file system on embedded memory, tolerant to power loss and intensive logging.
Cable‑free
Direct USB‑C connector: plug in, read out, sync — no extra accessory needed.
LogNex app
Graph curves, export data and set threshold alerts from the Android companion app.
Download LogNex
LogNex is the Android app provided with every EnviroLog‑C250‑TH: configuration, data retrieval and graphical visualization. Access is reserved for device owners — enter the SHT sensor serial number printed on your EnviroLog's label.
Android 6.0+ · USB OTG required · iOS version coming soon.
Position the label's code inside the frame.
SIM&TECH
SIM&TECH is an instrumentation company built to develop reliable connected devices, from the sensor through the firmware to the app. We control the entire chain — electronic design, embedded development and software — with a strong commitment to technical and documentation rigor at every step.
Electronica Munich 2026
SIM&TECH will be visiting Electronica Munich, the international trade fair for electronic components and systems, from November 10–13, 2026.
Let's talk about your use case
A question about the EnviroLog‑C250‑TH, an environmental monitoring project, a partnership request? Write to us.