Aranet4 Indoor Air Quality Monitor, Wireless CO2 Detector for Home

An ordinary price for this.

Office

$189.00

at Amazon· sold by ARANET USA

An ordinary price for this.

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Watch this priceCompare

$189.00 is an ordinary price for this.

The middle price across the 23 days we have watched it, counting the days a limited-time deal was running, was $189.00. No price it held was below today's, so waiting has nothing in our record to wait for. It touched $151.00 on October 6 without holding it.

The lowest, $151.00 on October 6, was a deal only Prime members could buy at. The lowest anyone could pay was $189.00.

This describes the prices we recorded. It is not a forecast of where this one goes next.

Price at AmazonVerified Oct 10, 1:46 AM UTC

Price history

One line: the best price any tracked retailer charged, per day.

Price set by a third-party seller, not the retailer itselfDeal for Prime members only

23 days on record · 2 price changes

sales rank — the line rises as it sells moreShaded stretches are sales, from our calendar.

Use this chart elsewhere:The chart redraws itself as we record new prices.

Prices we recorded ourselves. Usual is the price on the typical day, with limited-time deals left out unless they ran on most of the days we recorded; Average is the mean of every recorded day, deals included, so a gap between the two columns is a record holding an outlier.
Price	Now	Lowest	Highest	Usual	Average	Days recorded
New	$189.00	$151.00 on Oct 6	$189.00 on Sep 18	$189.00	$187.35	23

Sales events

Next on the calendar: Black Friday, November 27. We keep checking this price through it and report here what it did.

What our record shows

$38.00 more than the $151.00 it cost on October 6 — this price went up, not down.

Computed from our own checks at Amazon as of October 10. No line here uses a price a retailer told us about.

Where to buy

Amazon$189.00Go

Held for: 3d
Their 23-day low: $151.00
Checked: 4h ago

Prices checked at least every 12 hours. “Held for” is how long that retailer has been charging this price. A hidden price is one we cannot re-confirm recently enough to publish.

We earn a commission on purchases. It never affects our rankings.

Tell me when it drops

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Under a priceNew record lowBack in stock

Already bought it? Tell me if it drops within Amazon’s 30-day return window

Alert me underYou paid

Which offers

Bought on

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What it is

6 attributes, in the retailer’s own words. We record the prices; these we only pass on.

Size: 70x70x24 mm / 2.76x2.76x0.94 inches
Color: White
Weight: 0.23 pounds
Dimensions: 2.76 × 2.76 × 0.94 inches
Model: TDSPC003.001
Warranty: 2 Year Manufacturer Warranty

Cheaper in Air & climate, and what changes

Things we track on the same shelf for at least 10% less than $189.00, with the attributes the retailers describe differently. Their words, not our judgement — we record prices, we do not test products.