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Monoprice 21594 review

An 800 W immersion circulator with an LED touch screen and an adjustable clamp, rated 41–212 °F with 1% temperature stability and an 8.5 L/min pump.

The net of it Forty-five dollars, eight hundred watts, and the widest usable temperature range on this shelf — it is the only item here that reaches boiling. It expresses its bath limit as pot capacity, which no other page does, and its stability as one percent, which no other page would dare.

What the maker puts in writing

  • “The bright and easy to read LED touch screen allows you to easily adjust the cooking temperature and time. You can start or pause cooking by touching the start/Pause button in the middle”
  • “The sous vide cooker includes an adjustable clamp, so you can attach it to a wide variety of cooking pots from 2. 6 to 4. 0 gallons capacity”
  • “The cooker sits in a bath of hot water and never comes into direct contact with the food, so cleanup is a breeze”
  • “800 watts maximum cooking power. +41 +212 Degree (+5 +100 Degree) temperature range. 1% temperature stability”
  • “2. 25 gallons (8. 50 liters) per minute circulation pump”
  • From the name: “Strata Home Collection”, “Black and Silver”
  • Reference 21594 · Catalog: 1497 g (52.8 oz)

One percent stability, which is the loosest claim on this shelf and may be the truest

“1% temperature stability”

At 140 °F — a medium-rare steak — one percent is about 1.4 °F. At 60 °C it is 0.6 °C.

Against what the rest of the shelf claims:

± 0.1 °C (0.2 °F) accuracy — the Anova Nano at $68.28, the only item here to use the word accuracy about a figure 0.1 °C (0.2 °F) accuracy — the Inkbird at $95.99 “Setting accuracy can be up to 0.1℉/0.1℃” — all five KitchenBoss units, which is a statement about the display rather than the water A 0.1 °F readout with 0.5 °F setting increments — Greater Goods at $89.99 Nothing at all — the Anova 2.0 at $117.99, the Anova 3.0 at $169.99, the Anova Pro at $271, the Breville Joule Turbo at $149.95

Why the loose figure may be the honest one.

A tenth of a degree of stability in a stirred water bath is a plausible claim about the controller. It is not a claim about the water around your food.

A bath has a hot zone at the heater, a cool zone at the far corner, and a bag of cold meat somewhere in between. What evens that out is circulation, not the controller.

And this pump moves 2.25 gallons (8.5 L) per minute, against 20 L/min on three of the five KitchenBoss units and 16 L/min on the other two.

So the honest reading of this shelf is that the published stability figures are controller specifications and the published flow figures are the ones that decide how uniform the bath is — and this page is the only one whose stability figure is loose enough to be describing water.

What one percent costs you in practice: very little.

Sous vide works because the bath is held at the target core temperature, so the food cannot overshoot. A steak held at 135 ± 1.4 °F is still a steak at 135 °F.

Where it would matter is eggs, which change character across two or three degrees between 145 and 167 °F, and custards. For meat, one percent is fine.

Eight hundred watts, the lowest on this shelf

The shelf, on power:

1200 W — the Anova Pro at $271 1100 W — all five KitchenBoss units, the Anova 3.0 at $169.99, Greater Goods at $89.99, and the Anova 2.0 at $117.99 by its own bullet 1000 W — the Inkbird at $95.99, and the Anova 2.0 by its own title 800 W — this Not published — the Anova Nano at $68.28 and the Breville Joule Turbo at $149.95

What wattage buys, and what it does not.

It buys heat-up time and nothing else. Once a bath is at temperature, holding it takes a fraction of the rated power — the heater cycles, and the losses it is making up are evaporation from the surface and conduction through the pot walls.

Which is why the biggest bath claim on this shelf belongs to a 1200 W unit and is really a claim about a lid. The Anova Pro at $271: “able to heat up to 100L of water when in a covered container.”

1200 W into 100 L raises the temperature about 0.17 °C a minute at best. Six hours from cold to 65 °C. The covered container is doing the work, not the element.

For a realistic bath, the arithmetic is kinder. 800 W into 12 liters is roughly 1 °C a minute in theory — so from tap-hot to 60 °C is a few minutes, and from cold is half an hour.

The practical shortcut, which no page on this shelf mentions: fill it from the hot tap. A domestic hot water supply is often already at 120 to 140 °F, which is most of the way to a steak temperature, and it turns the power difference across this whole shelf into a rounding error.

The only circulator here that reaches boiling

“+41 +212 Degree (+5 +100 Degree) temperature range”

The shelf, on range:

41–212 °F (5–100 °C) — this 32–197 °F (0–92 °C) — the Anova Nano at $68.28 68–203 °F (20–95 °C) — Greater Goods at $89.99 77–210 °F (25–99 °C) — the Inkbird at $95.99 104–194 °F (40–90 °C) — all five KitchenBoss units, the narrowest here Nothing published — the Anova 2.0 at $117.99, the Anova 3.0 at $169.99, the Anova Pro at $271, the Breville at $149.95

Four items publish no range at all, and three of them are the most expensive circulators on this shelf.

What the top end is for. Nothing in sous vide needs more than 194 °F. The hottest ordinary sous vide temperature is around 185 °F, for root vegetables and for tough cuts held long — and most of the range is spent between 130 and 165.

Above that, a circulator stops being a sous vide tool and becomes a water bath: blanching, holding stock, reheating sealed food fast, infusing.

A 212 °F ceiling means it will hold a near-boil rather than fight it — and a unit running at its stated maximum all day is running at full duty, which is where the 800 W rating and the absence of any hours figure start to matter. The Anova Pro at $271 is the only item here to publish a service life: “run for a minimum of 10,000 hours straight.”

The bottom end is the less meaningful number. 41 °F is below any cooking temperature, and a circulator cannot cool water — so a floor of 41 °F is the same kind of claim as the Anova Nano’s 32 °F, which is the freezing point of water. Neither can get there.

A floor only means something above room temperature. Which is where the KitchenBoss figure matters: 104 °F excludes chocolate work in the high 80s and low 90s, and every other circulator on this shelf can reach it.

Pot capacity, which is the only version of this figure you can check

“an adjustable clamp, so you can attach it to a wide variety of cooking pots from 2.6 to 4.0 gallons capacity”

2.6 to 4.0 US gallons is about 9.8 to 15.1 liters.

And it is the only bath limit on this shelf stated as a pot rather than as water.

100 L — the Anova Pro at $271, with the whole claim carried by “when in a covered container” 50 L — the KitchenBoss G322PT at $129.99 15 L — Greater Goods at $89.99 and the Inkbird at $95.99 Nothing — the other eight

Why the pot version is the useful one. A circulator clamps to a rim, and the two things that decide whether it works are the depth of the pot and the thickness of its lip — neither of which a liter figure tells you.

A 15-liter statement does not say whether it will clamp to your stockpot. A 2.6-to-4.0-gallon statement is a near-direct answer.

And the figure this whole shelf hides is the minimum water depth.

The Anova 3.0 at $169.99 refers to it without giving it: “an ideal fit on nearly any pot that is deep enough to meet the minimum water depth requirements.” The KitchenBoss G322PT at $129.99 gestures at it: “low minimum water depth”. Nobody publishes the number.

It is the figure that decides whether a circulator will run in your pot at all, because below the minimum mark the heater cuts out — which Greater Goods at $89.99 is the only page here to describe as a behavior: “Clearly marked MIN/MAX lines show where to fill, and if water runs low, heating stops as the status light turns red.”

The body lengths give you a proxy, and this is a long one. 411 mm overall by the catalog, against 304 mm for the Breville at $149.95 — and the Breville is the one most likely to work in a shallow pot.

The other half of fit is the body diameter, which matters if you ever buy a lidded container. The homenote kit at $54.99 is the only accessory on this shelf and its lid has a pre-cut hole, tested for ANOVA and CHEFSTEPS only. A 208 mm figure in this unit’s catalog dimensions is the carton rather than the body, so there is no way to tell from this page whether it would pass through that hole.

An LED touch screen, and no timer figure

“The bright and easy to read LED touch screen allows you to easily adjust the cooking temperature and time. You can start or pause cooking by touching the start/Pause button in the middle”

The page says it adjusts time and never says how much time.

The shelf, on timers:

1 minute to 99 hours, with an audible alert and an overtime counter — Greater Goods at $89.99 Up to 99 hours — the Inkbird at $95.99 Up to 99 hours 59 minutes — the KitchenBoss G330 at $169.99 Not published — the other ten, this included

Why a long timer is the specification that matters on a sous vide cooker. The technique’s whole advantage is that time stops being critical — a steak at 131 °F is done in an hour and still a steak at four. But the long cooks are the reason to own one: brisket at 155 °F for 24 to 36 hours, short ribs for 48, tough cuts for 72.

A timer that tops out at 24 hours would make those cooks manual. One at 99 hours makes them automatic.

And what a timer on a sous vide cooker actually does is the thing Greater Goods is alone in explaining: “When your set time is reached, an audible alert sounds while the cooker holds temperature and an overtime counter tracks every minute beyond the timer.”

It does not switch off. Which is correct — switching off a bath with food in it is a food-safety problem, not a convenience — and it is the behavior you most want to know and that twelve of fourteen pages here do not state.

“Start or pause” is a small thing done right. A pause rather than a stop means the set temperature survives, which matters when you lift a bag out to check it.

Never touches the food, which is the quiet argument for the whole category

“The cooker sits in a bath of hot water and never comes into direct contact with the food, so cleanup is a breeze”

True, and the one real cleaning advantage an immersion circulator has over a multi-cooker or a water oven: there is no cooking vessel to wash.

What it does not address is the part that gets dirty. A circulator’s heater and impeller sit in water that has had bags in it for hours — and bags leak, fat gets into the bath, and mineral scale builds on the element.

Which is why six items on this shelf publish an immersion rating and this one does not.

IPX7 — all five KitchenBoss units, and the Anova Pro at $271 (and the Pro adds drop tested) “Water resistant for when accidents happen in the kitchen” — the Anova 2.0 at $117.99, which is not a rating Nothing — the Anova Nano at $68.28, the Anova 3.0 at $169.99, the Breville at $149.95, Greater Goods at $89.99, the Inkbird at $95.99, and this

IPX7 means immersible to a meter for thirty minutes, and on five of those six pages it is used for exactly one purpose: you can wash the whole thing. The KitchenBoss G300S at $105.99: “can be cleaned by putting the entire body in water, allowing you to deep clean every crevice of oil stains.”

The better answer is a removable housing, and four items here have one. Greater Goods at $89.99 — “A removable, dishwasher-safe stainless-steel housing” · the Anova 3.0 at $169.99 — “a removable stainless steel skirt… detach and clean the skirt either by hand or in the dishwasher” · the KitchenBoss G322PT at $129.99 — “the detachable sleeve is dishwasher safe” · the G320PS at $159.99 and the G310PS at $112.52 — “removable stainless steel sleeve”, without the dishwasher claim.

This unit has neither. Which on a page whose own bullet sells cleaning is the gap worth naming — and the practical answer is descaling: a cycle of water and white vinegar held warm will take the scale off an element that no cloth can reach.

What is not published

No timer range, as above — on a tool whose point is long cooks.

No minimum water depth, as above — which nothing on this shelf publishes.

No waterproof rating, as above.

No calibration. Two items on this shelf let you correct the reading. Greater Goods at $89.99: “built-in calibration lets you fine-tune the reading against a trusted thermometer.” The Inkbird at $95.99: “a user-friendly calibration function (adjustable from -10F to +10F).” Why it is the honest precision feature: a 1% stability figure describes how steadily the bath holds a reading, and nothing on this page describes whether the reading is right. A sensor that reads two degrees high holds two degrees high all day.

No noise figure. One item on this shelf gives one: the Inkbird at $95.99, “less than 40dB”. Three others claim quiet without a number, and all three name the same mechanism — a brushless DC motor — which this page, the Anovas and the Breville do not mention at all. On a cook that runs overnight, the pump is the thing you hear.

No motor type, as above.

No warranty. One item on this shelf publishes one: Greater Goods at $89.99 — “Backed by 5-year coverage and our St. Louis-based support team.” Thirteen publish nothing.

No bag sealing. Not at least one of the eighteen items on this shelf is or includes a vacuum sealer — and the technique needs the food sealed. Zip bags displaced by water work for short cooks; a long cook at 155 °F wants a real seal.

No cord length, which no item on this shelf publishes.

Availability

Read on the day this page was built: $45 at the American Amazon shop.

Read from Keepa on the day this page was last revised; stock and price both move without notice.

Prices quoted in this text were read on 2026-10-05. The live price is at the top of the page.

Its two closest in price

Same shelf, nearest cost — where the same money else goes.

The plus side, and the minus

Strengths

  • The only circulator on this shelf that reaches 212 °F
  • Its bath limit is stated as pot capacity, which is the figure you can actually check
  • Forty-five dollars, and the cheapest circulator here by twenty-three

Compromises

  • 1% stability at 140 °F is about ±1.4 °F, where others claim a tenth
  • 800 W is the lowest power here, against 1000 to 1200 on everything else
  • No timer, no waterproof rating, no calibration and no warranty

Specifications

Temperature range41–212 °F (5–100 °C) — the only one here that reaches boiling
Temperature stability1% — stated, and the loosest figure on this shelf
Power800 W maximum — the lowest here
Pot capacity2.6 to 4.0 gallons — the only bath limit here expressed as a pot
Circulation2.25 gallons (8.50 L) per minute
ClampAdjustable
DisplayLED touch screen with a central start/pause
Reference21594, Strata Home Collection
Weight1497 g (52.8 oz)
TimerNot published
WaterproofingNot published; six items here publish IPX7
App or WiFiNone mentioned
CalibrationNot published; two items here allow it
WarrantyNot published
Amazon referenceB06XWVXNWQ
EAN0889028049167

What readers want to know

What does "1% temperature stability" actually mean?

That the bath can wander by a percentage of the reading, which is a far looser promise than a tenth of a degree — and it is the only honest-looking figure on this shelf. Bullet four: "800 watts maximum cooking power. +41 +212 Degree (+5 +100 Degree) temperature range. 1% temperature stability." Work it out. At 140 °F — a medium-rare steak — one percent is about 1.4 °F. At 60 °C (140 °F) it is 1.1 °F (0.6 °C). Against what the rest of the shelf claims: ± 0.1 °C (0.2 °F) accuracy — the Anova Nano at $68.28, the only item here to use the word accuracy about a figure · 0.1 °C (0.2 °F) accuracy — the Inkbird at $95.99 · "setting accuracy can be up to 0.1℉/0.1℃" — all five KitchenBoss units, which is a statement about the display rather than the water · a 0.1 °F readout with 0.5 °F setting increments — Greater Goods at $89.99 · and nothing at all — the Anova 2.0, 3.0, Pro and the Breville Joule Turbo. Why the loose figure may be the truthful one. A tenth of a degree of stability in a stirred water bath is a plausible claim about the controller. It is not a claim about the water around your food — because a bath has a hot zone at the heater, a cool zone at the far corner, and a bag of cold meat in it. What makes the difference is circulation, not the controller, and this pump moves 2.25 gallons (8.5 L) per minute against 20 L/min on three KitchenBoss units. And what one percent costs you in practice: very little. Sous vide works because the bath is held at the target core temperature, so the food cannot overshoot. A steak held at 135 ± 1.4 °F is still a steak at 135 °F — the texture difference across that band is not something you can taste. Where it would matter is eggs, which change character across two or three degrees between 145 and 167 °F, and custards. For meat, 1% is fine.

Why is 212 °F unusual, and is it useful?

Because it is boiling, and this is the only item on this shelf that reaches it. The shelf, on temperature range: 41–212 °F (5–100 °C) — this · 32–197 °F (0–92 °C) — the Anova Nano at $68.28 · 68–203 °F (20–95 °C) — Greater Goods at $89.99 · 77–210 °F (25–99 °C) — the Inkbird at $95.99 · 104–194 °F (40–90 °C) — all five KitchenBoss units, the narrowest here · and nothing published — the Anova 2.0 at $117.99, the Anova 3.0 at $169.99, the Anova Pro at $271 and the Breville at $149.95. So four items publish no range at all, and three of them are the most expensive circulators on this shelf. What the top end is for. Nothing in sous vide needs more than 194 °F. The hottest ordinary sous vide temperature is around 185 °F, for root vegetables and for tough cuts held long — and most of the range is spent between 130 and 165. Above that, a circulator becomes a water bath for other jobs: blanching, holding stock, reheating sealed food fast, infusing. The 212 °F ceiling means it will hold a near-boil rather than fight it — and a circulator running at its stated maximum all day is a circulator running at full duty. The bottom end is the more interesting number. 41 °F is below any cooking temperature, and a circulator cannot cool water — so a floor of 41 °F is the same kind of claim as the Anova Nano’s 32 °F, which is the freezing point. Neither can get there. A floor only means something above room temperature, and that is where the KitchenBoss figure matters: 104 °F excludes chocolate work in the high 80s and low 90s, which every other circulator on this shelf can reach.

What does a pot capacity of 2.6 to 4.0 gallons tell you?

More than a liter figure does, because it is the dimension you can check before you buy. Bullet two: "The sous vide cooker includes an adjustable clamp, so you can attach it to a wide variety of cooking pots from 2.6 to 4.0 gallons capacity." 2.6 to 4.0 US gallons is about 9.8 to 15.1 liters. And it is the only bath limit on this shelf stated as a pot rather than as water. What the rest of the shelf says: 100 L — the Anova Pro at $271, with the whole claim carried by "when in a covered container" · 50 L — the KitchenBoss G322PT at $129.99 · 15 L — Greater Goods at $89.99 and the Inkbird at $95.99 · and nothing — the other eight. Why the pot version is the useful one. A circulator clamps to a rim, and the two things that decide whether it works are the depth of the pot and the thickness of its lip — neither of which a liter figure tells you. A 15-liter statement does not say whether it will clamp to your stockpot. A 2.6-to-4.0-gallon statement is a near-direct answer. And the figure the whole shelf hides is the minimum water depth. The Anova 3.0 at $169.99 refers to it without giving it: "an ideal fit on nearly any pot that is deep enough to meet the minimum water depth requirements." The KitchenBoss G322PT gestures at it: "low minimum water depth". Nobody on this shelf publishes the number — and it is the figure that decides whether a circulator will run in your pot at all, because below the minimum mark the heater cuts out. The body lengths give you a proxy. This unit catalogs at 411 mm (16.2 in) overall and the Breville at 304 mm (12 in) — and the Breville is the one most likely to work in a shallow pot.

What this one costs among kitchen appliances

Details checked on October 5, 2026.

The buyer this one serves, among kitchen appliances

A first circulator, and the only one here that can hold water near boiling

What buyers actually choose

Amazon reports what buyers took in the month before this page was last checked: at least 300.

The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.

Sources

Specifications: the manufacturer sheet for kitchen appliances and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.

What we look at on these kitchen appliances