Conditional verdict: Shortlist the single MX1101 when you want indoor temperature and relative-humidity records that a nearby compatible device can retrieve over Bluetooth, without removing a data card.[1][3] Its useful distinction is local access to an installed logger—not a promise of better environmental control or validated preservation. The purchase only makes sense if the host, app and dry indoor deployment suit your task.
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A different way to retrieve the record
The maker describes a self-contained logger with integrated temperature and RH sensing, an LCD and Bluetooth communication to a mobile device or Windows computer.[1] The manual says data can be read out after logging begins, while the app provides configuration, graphs and export.[3][4] That makes local collection worth considering where handling a storage card or connecting a dedicated data cable would be inconvenient. Radio access still depends on the actual surroundings and compatible host.
Extech SD700 already records temperature, RH and pressure to an SD card for date/time-stamped computer analysis.[5] Its card workflow requires ending recording before card removal; it also documents a separate optional RS232/USB route.[5] MX1101’s buying case is the Bluetooth data handoff, not a claim that SD700 cannot record or export. If pressure belongs in the same record, dropping that channel is a different trade-off from changing how you collect the files.
Check the app and the communication boundary
The current HOBOconnect page describes a free Bluetooth app with no Internet connection required for local work and export as CSV, XLSX or HOBO files.[4] It lists iOS 16+, Android 14+, Windows 10+ and Bluetooth 4.X+; the instrument manual additionally specifies a native BLE adapter or supported BLE dongle for Windows.[3][4] Confirm the intended host against that listing before purchase. No app installation, pairing or host-feature test was performed for this review.
The documented radio range is approximately 100 feet with full line-of-sight.[3] That is not guaranteed performance through walls or enclosures, and Bluetooth alone is not an Internet connection. The maker separately offers an MX Data Plan for LI-COR Cloud, formerly HOBOlink, and an optional gateway for automatic offload.[1] Keep remote cloud access, its account and paid-service requirements separate from the local-app recommendation; none is established as an inclusion in the base offer.
Logging rate, response and storage are different quantities
The selectable logging interval runs from one second to eighteen hours, but the LCD refreshes every fifteen seconds.[3] Neither figure establishes the time a sensor needs to respond to a change. The temperature response specification is 7 minutes 30 seconds in air moving at 1 m/s; RH response is twenty seconds to 90% under that airflow condition.[3] A short recording interval does not make this a validated fast-transient measurement system.
Memory is 128 KB with a maximum of 84,650 measurements, and the manual distinguishes overwrite-on-full from stop-on-full behavior.[3] Selected statistics consume extra memory and shorten recording duration.[3] Treat the capacity as a configuration-dependent record budget, not a per-channel count, a fixed number of days or an unlimited archive.
Burst logging has an important exclusion: sensor alarms, statistics and Never Stop overwrite are unavailable in that mode.[3] The manual also says burst limits are checked on the fifteen-second LCD refresh cycle.[3] Do not combine every item in a feature list into one promised configuration, or treat the shortest interval as immediate alarm response. These are capabilities to compare with the task, not a setup or safety-monitoring prescription.
Read the environmental and accuracy limits in context
Temperature measurement spans −20 to 70 °C, while the stated ±0.21 °C accuracy applies from 0 to 50 °C.[3] For RH, the manual gives 1–90% non-condensing measurement versus 0–95% non-condensing logger operation.[3] Its central-band accuracy is ±2% typical from 20–80% RH, with a maximum ±4.5% including hysteresis at 25 °C; below and above that band it gives ±6% typical.[3] Those are published conditional specifications, not measurements made at your site.
The logger is intended for indoor use, is rated IP50 and can be permanently damaged if wet or exposed to condensation.[3] The LCD is specified as visible from 0 to 50 °C and may slow or go blank outside that range.[3] Plan around the instrument, sensor and display limits separately. A room-condition record can accompany collection or storage work without proving that the climate was controlled, a specimen preserved or an audit requirement met.
The manual’s radio installation notice requires at least 20 cm separation from persons and prohibits co-location or operation with another antenna or transmitter.[3] Include those conditions when judging placement; the logger’s convenience does not remove its documented deployment requirements.
Buy the single logger, not an assumed monitoring system
The selected ordinary listing identifies the offered model as Onset MX1101.[2] The single-model maker package lists the MX1101, Command strip, double-sided tape, hook-and-loop strap and two AAA 1.5 V alkaline batteries.[1][3] A separately advertised ten-logger bundle, optional certificate, gateway or cloud plan is not the base package. Confirm the exact seller’s current contents and support terms rather than treating a family illustration as a supplied-system list.
The maker’s typical one-year battery figure is tied to one-minute logging, while the manual separately qualifies endurance by conditions, sampling, app connection, readouts and alarms.[1][3] Faster settings and extra activity can change that trade-off. Choose around the access method and record needed, not an untested endurance expectation or the most attractive number on the display.
The buying decision
Choose MX1101 for documented indoor temperature/RH logging when a compatible host and local Bluetooth offload are the reason to buy it.[1][3][4] Choose another workflow when you need pressure in the record, removable-card access, a wet deployment or an unsupported host. Treat optional cloud services and gateways as separate decisions, and do not turn environmental readings into a preservation, clinical or compliance guarantee.
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Check the current HOBO MX1101 offer on Amazon
Sources
The maker-linked MX1101 manual is labeled 17840-V and ©2014–2025.[3] The comparison uses the separate SD700-en-US_v2.8 9/23 manual.[5] The current HOBOconnect listing establishes published requirements, not a tested installation or the firmware supplied in a seller’s unit.[4] This is a documentation-based buying review, not a physical accuracy, endurance or pairing test.