DS1922L

DS1922L High-Resolution Temperature Logger

±0.5 °C accuracy and 0.0625 °C resolution per the datasheet, sampling as fast as once per second.

Where the DS1921G records the temperature history of a shipment, the DS1922L is specified for finer readings and can catch events a slower logger would miss. Software-corrected accuracy is ±0.5 °C from −10 to +65 °C, resolution goes to 11-bit (0.0625 °C), and the sample interval starts at one second (all per the original manufacturer's datasheet; confirm for the supplied version) — fast enough to capture a door opening, a defrost cycle or a freeze-drying step rather than just the hourly average. Two-level password protection locks the mission data, and 512 bytes of user memory travel with the device to carry batch or route identifiers.

Ordering information

MOQ	Confirmed by model and order when quoting
Preparation time	Availability and lead time are confirmed by model and order when quoting
Packing	Confirm pack quantity, protection and labelling for the selected model.
Samples	Sample quantity, fees and shipping are confirmed for the selected model.
Payment	Agree payment terms and the payee in the quotation and invoice.
Shipping	Confirm the shipping method, cost and timing for your destination and order.
Customization	State ROM, colour, marking and packing needs; feasibility and cost require confirmation.

Why this model

Sampling as fast as once per second

Its minimum sample interval is 1 second, against 1 minute on the DS1921G and 5 minutes on the DS1925 — a 60× and 300× difference (per the original manufacturer's datasheets). That is the gap between recording that a freezer door was opened and never knowing it happened. Pair that with ±0.5 °C software-corrected accuracy and 0.0625 °C resolution (same datasheet basis; confirm for the supplied version) and you have a candidate for process monitoring, freeze-drying and autoclave cycles where the excursion lasts minutes, not hours. Check any formal validation or qualification requirement against your own quality system.

Key features

Original DS1922L reference: 8 KB log memory for 8,192 8-bit or 4,096 16-bit temperature readings.
Original measurement resolution is selectable between 0.5 °C and 0.0625 °C; recording interval ranges from 1 second to 273 hours.
Confirm the L variant, correction software and mission settings, and ask whether calibration records are available; resolution is not the same as measurement accuracy.

Specifications

Chip / compatibility	DS1922L · family code 41h
Memory	8 KB data log = 8192 readings (8-bit) or 4096 (16-bit) + 512 B user SRAM + 64 B calibration memory
Operating temperature	−40 to +85 °C · 0.5 °C (8-bit) or 0.0625 °C (11-bit) · ±0.5 °C software-corrected (−10…+65 °C) — per the original manufacturer's datasheet; confirm for the supplied version
Protocol	Sample rate 1 s to 273 h; start immediately, after a delay, or on a temperature alarm; two-level password protection (per the original manufacturer's datasheet; confirm for the supplied version)
Package	F5 stainless can · a DS1922T variant (0 to +125 °C per the original manufacturer's datasheet) may be available; availability is confirmed in the quote
Options	Read out with a DS9490R USB adapter + OneWireViewer; calibration certificates or traceability documents, if you need them, are confirmed in the quote.

Inside the stainless can

Typical F5 can: Ø16.25 × 5.89 mm · typical F3 can: Ø16.25 × 3.10 mm

Typical construction of this can format: a stainless-steel shell, an insulating grommet separating lid from base, and the chip bonded inside. Lid = data contact, base = ground return. Wall thickness, grommet material and other construction details: confirm for the supplied version.

Which logger should you order?

The four Thermochron / Hygrochron loggers side by side — specifications per the Analog Devices datasheets.

	DS1921G	DS1922L	DS1923	DS1925
Measures	Temperature	Temperature	Temperature + humidity	Temperature
Range (per original datasheet)	−40 to +85 °C	−40 to +85 °C	−20 to +85 °C · 0–100 % RH	−40 to +85 °C
Accuracy (per original datasheet)	±1 °C	±0.5 °C	±0.5 °C · ±5 % RH	±0.5 °C
Best resolution (per original datasheet)	0.5 °C	0.0625 °C	0.0625 °C · 0.04 % RH	0.0625 °C
Log capacity	2048 readings	8192 readings (8 KB)	8192 readings (8 KB)	125,440 readings (122 KB)
Fastest sample rate	1 min	1 second	1 second	5 min
Histogram	Yes — 63 bins at 2 °C	—	—	—
Password protection	—	Two-level	Two-level	Two-level
Family code	21h	41h	41h	53h
Choose it when…	High-volume cold-chain shipments where a simple logger is enough	Process monitoring, fast excursions, tighter accuracy	Condensation, mould, corrosion — RH matters	Long ocean freight, long unattended missions

Typical applications

Cold Chain & Temperature Logging

Frequently asked questions

DS1921G or DS1922L — which temperature logger do I need?

Two things separate them: speed and precision. Per the original manufacturer's datasheets, the DS1922L samples as fast as once per second (the DS1921G once per minute) and reaches ±0.5 °C accuracy with 0.0625 °C resolution, versus ±1 °C and 0.5 °C; confirm for the supplied version. If you are proving a shipment stayed within a broad range, the DS1921G may be enough and adds a histogram. If you must catch short excursions — a door opening, a defrost cycle, an autoclave ramp — or defend a tight specification, use the DS1922L.

How long can one DS1922L mission run?

It depends entirely on the sample interval you program, which per the original manufacturer's datasheet ranges from 1 second to 273 hours (confirm for the supplied version). At 8-bit resolution the log holds 8192 readings: one per minute covers about 5.7 days, one per 15 minutes about 85 days, one per hour about 11 months. At 16-bit resolution halve those figures (4096 readings). You can set the log to stop when full or to roll over and overwrite the oldest data.

What do I need to read the data out?

A 1-Wire host and software. The usual kit is a DS9490R USB adapter with a DS1402D Blue Dot cable, running OneWireViewer or your own application on the 1-Wire API — touch the logger to the receptor and the mission, log, alarms and histogram can be downloaded; download time depends on your host and on how full the log is. If you need the read-out kit as well, ask whether it can be quoted together with the loggers; availability is confirmed in the quote.