Marmonix MHT-50 Single-Use Temp and Humidity Logger

The Marmonix MHT-50 USB temperature humidity data logger is a single-use recorder for cold-chain, pharma and storage shipments. It measures −30 °C to +70 °C and 0–100% RH (±0.5 °C / ±3% RH in the main band), sits in an IP66 body of 83.5 × 27.7 × 7.5 mm at 16 g, and writes a tamper-evident PDF plus CSV when you plug its USB connector into a PC—no driver install. Default logging is 90 days at a 5-minute interval (customisable), with a 30-minute start delay and preset 2–8 °C / 20–80% RH alarms shown on blue, green and red LEDs. Browse all Marmonix data loggers, or see the LCD sibling MHT-51 single-use logger when you need on-device MAX/MIN/AVG readouts.

MarMonix MHT-50 temperature and humidity data logger Overview

The MarMonix MHT-50 is a compact, high-precision, single-use USB temperature and humidity data logger engineered for strict environmental validation during logistics, cold storage, and cleanroom monitoring. Designed for immediate field deployment, it features an IP66 water- and dust-resistant casing, internal precision sensors, and pre-configured or customizable logging intervals ranging from 1 minute up to 24 hours.

Upon reaching the destination, users simply connect the MHT-50 directly to any standard computer USB port. The device automatically generates tamper-evident PDF analytical reports and raw CSV datasets instantly—eliminating software installation friction and accelerating cargo release workflows.

Key Features & Capabilities

What the MHT-50 gives you on a shipment:

• Plug-and-Play USB Interface: Instant automatic PDF and CSV report generation upon connection—no specialized software or driver installation needed.
• Wide Dynamic Range: Measures temperatures from -30 °C to +70 °C (-22 °F to +158 °F) and 0 to 100% RH with ±0.5 °C temperature accuracy and ±3% RH humidity accuracy.
• Tri-Color LED Status Diagnostics:
  • Blue LED: Indicates start-delay mode (default 30 min delay for thermal equilibrium).
  • Green LED: Confirms active logging within safe predefined thresholds (default: 2°C to 8°C & 20–80% RH).
  • Red LED: Instantly flags temperature/humidity excursion alarms.
• Rugged Enclosure: Rated IP66 ingress protection for reliable performance in condensing refrigerated containers and wet environments.
• Ultra-Slim & Lightweight: Pocket-sized form factor (83.5 × 27.7 × 7.5 mm, 16 g) easily inserts into pharmaceutical shippers, insulated thermal boxes, and pallet packages.

MarMonix MHT50 Technical Specifications

How single-use USB loggers are used on cold-chain shipments

In a typical refrigerated or insulated shipment, the receiver needs proof that temperature and humidity stayed inside the agreed band for the whole trip, without installing software at every destination.

A single-use USB logger is packed with the goods, started after a short delay so the probe can settle, and left to record at a fixed interval. On arrival the device is plugged into any computer; it presents a PDF summary and a CSV of the raw points so the receiving team can release or quarantine the cargo. WHO Technical Report Series 961 Annex 9 discusses temperature control in the supply chain for pharmaceutical products and the value of continuous monitoring records for that purpose.

Status LEDs help staff see start-delay, in-limit logging and excursion states before the report is opened. IP66 housing is used so condensation in refrigerated containers does not stop the run.

Questions about the MHT-50 data logger

What does the MHT-50 measure and for how long?

The MHT-50 records temperature from −30 °C to +70 °C and relative humidity from 0% to 100% RH. Default duration is 90 days at a 5-minute interval; both duration (7–360 days) and interval (1 minute to 24 hours) are customisable before use.

How do I get the report from the MHT-50?

Plug the MHT-50 into a standard USB port. It generates a tamper-evident PDF analytical report and a CSV dataset automatically, with no specialised software or driver install required.

What do the MHT-50 LEDs mean?

Blue indicates start-delay mode (default 30 minutes), green confirms active logging inside the preset thresholds (default 2–8 °C and 20–80% RH), and red flags a temperature or humidity excursion alarm.