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Atago 4491 PAL-91S Digital Hand-Held Pocket Double Scale Coolant Refractometer, Special Scale for Ethylene Glycol/Freezing Point of Ethylene Glycol (C)

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In stock

Good price

$408.22 is 10% below the $457.22 it normally sells for.

Now
$408.22
Normally
$457.22
Lowest in 136 days
$329.99(Jul 29)
Highest
$457.22
Evidence: Strong136 days tracked2 price changes

Where today's price sits

View on amazon.com (opens in a new tab)

Prices change. Confirm the price on Amazon before you buy. TrackPin may earn a commission if you buy, at no cost to you; it never changes a verdict.

Get an email when the price drops

Good: 5%+ below normal. Great: 20%+ below. One email when it happens, at a price below today's $408.22. No account, no newsletter.

Price history

Tracked since Jun 28 · 136 days · 2 price changes

Loading the price chart.

  • Price
  • Normal $457.22
  • 5% or more below normal

How often does it drop below normal?

In the 136 days we've tracked it, it stayed 5% or more below today's normal price for an hour or more twice, typically lasting about 26 days. It's below normal right now.

A count of what happened, not a prediction.

Other ways to buy

  • New from

    $408.22

    Olive CloverSeller rating 56% of 18

All 2 offers
All offers, by price
SellerConditionPriceFBASeller rating
Olive CloverNew$408.22No56% of 18
Thomas ScientificNew$479.71No85% of 1,813

More real deals in Industrial & Scientific

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Get this as JSONThe same verdict and prices, from the TrackPin API.
GET/api/v1/product/B004J4XEIS
Request
curl https://trackpin.co/api/v1/product/B004J4XEIS \
  -H "x-api-key: $TRACKPIN_API_KEY"

This is exactly what the API returns for this product. Free keys include 100 requests a day.

Request a key
Live response, As of 19:15 UTC
{
  "asin": "B004J4XEIS",
  "title": "Atago 4491 PAL-91S Digital Hand-Held Pocket Double Scale Coolant Refractometer, Special Scale for Ethylene Glycol/Freezing Point of Ethylene Glycol (C)",
  "image": "https://m.media-amazon.com/images/I/612t+xK1+tL._AC_SL500_.jpg",
  "currency": "USD",
  "category": "BISS Basic",
  "category_label": "Industrial & Scientific",
  "in_stock": true,
  "price": {
    "current_cents": 40822,
    "reference_cents": 45722,
    "discount_pct": 10.72,
    "is_deal": true,
    "observed_at": 1794410509050,
    "changed_at": 1794040937628,
    "checked_at": 1794410509050,
    "source": "stored"
  },
  "verdict": {
    "label": "good",
    "text": "Good price",
    "pct_vs_normal": 10.72,
    "evidence": "strong",
    "stale": false,
    "suspect": false,
    "steady_since": null,
    "sentence": "Good price. $408.22 is 10% below the $457.22 it normally sells for."
  },
  "listing_claim": null,
  "stats": {
    "min_cents": 32999,
    "max_cents": 45722,
    "avg_cents": 38549,
    "history_days": 136,
    "price_levels": 190,
    "price_changes": 2,
    "distinct_prices": 3,
    "lowest_at": 1785321671431
  },
  "history": [
    {
      "price_cents": 32999,
      "from": 1785298217732,
      "to": 1785298217732
    },
    {
      "price_cents": 32999,
      "from": 1785302311352,
      "to": 1785318478727
    },
    {
      "price_cents": 32999,
      "from": 1785321671431,
      "to": 1790896986661
    },
    {
      "price_cents": 45722,
      "from": 1790961517380,
      "to": 1794021883751
    },
    {
      "price_cents": 40822,
      "from": 1794040937628,
      "to": 1794410509050
    }
  ],
  "last_seen": 1794410509050
}
// … 185 more steps in the full response

Normal price: the lowest price level the product held for at least 15% of the last 45 days (about a week). Prices within 3% of each other count as one level, and we use the lowest price in that level. How we calculate it → Prices are observations of amazon.com and may be incomplete or delayed. TrackPin is not affiliated with Amazon.