Citizen · Promaster Aqualand · Ref BN2038-01L
A depth gauge with a watch attached.
Citizen’s Aqualand reads depth to 70 metres on a red hand, remembers the deepest point of the dive, warns of a fast ascent, and starts itself when it hits the water. Eco-Drive calibre J250 runs it on light. 46mm, 200m, crown on the left.
Depth meter
To 70m
Analogue hand; Citizen product page
Water resistance
200m / 20 bar
Rated for scuba diving by Citizen
Movement
Eco-Drive J250
Citizen product page
Case
46mm steel
Citizen product page
Dive functions
Auto-start, max depth, ascent alarm
Citizen product page
Strap
Blue polyurethane
Steel buckle; 21.55mm lug width per Citizen
The red hand
A long red arrow on the dial does one job: it points at the depth. The scale runs to 70 metres, and because it is a hand rather than a screen it can be read in poor light through a mask at a glance. Ready and Empty marks near nine o’clock show the state of the sensor.
Around it, calibre J250 keeps the deepest point of the dive in memory and sounds an alarm if the ascent is too fast. Dive mode starts on its own when the sensor meets water. None of that needs a button press.
Why the crown is on the left
The sensor housing and its two pushers sit on the left side of the 46mm steel case, with a large fluted crown between them. That keeps the whole cluster away from the back of the hand and leaves the right side clean.
The bezel is a unidirectional diver’s bezel in two colours, blue and red, with a luminous marker at twelve. It counts elapsed time in the ordinary way; the depth work is done by the hand, not the ring.
Light-powered, deep-rated
Eco-Drive charges from any light reaching the dial and shows its remaining charge on a power reserve indicator, so there is no cell to fail at depth and no caseback to open, which matters on a watch whose seals are the whole point.
Citizen rates the case at 200m, 20 bar, and describes it as suitable for scuba diving. The crystal is mineral, which Citizen specifies as impact and shatter resistant. The strap is blue polyurethane on a steel buckle, and the dial carries a date.
Specs
- Reference
- BN2038-01L
- Case size
- 46mm
- Case material
- Stainless Steel
- Movement
- Eco-Drive
- Caliber type
- Citizen Eco-Drive
- Water resistance
- 200m Diver
- Complications
- Depth Meter, Auto-Start Dive Mode, Date
- Origin
- Citizen (Japan)
Specifications as published by Citizen. We research from manufacturer documentation and published sources rather than hands-on testing. Researched 2026-09-03.
Verdict
A working analogue dive computer with a 70m depth hand, max-depth memory and an ascent alarm, on a 200m Eco-Drive that never needs a battery.
Strengths
- Real depth meter to 70m on an analogue hand
- Max-depth memory, rapid ascent alarm and auto-start dive mode
- Eco-Drive J250 with a power reserve indicator; no battery to fail underwater
- 200m rating suitable for scuba per Citizen, with a unidirectional bezel
Trade-offs
- 46mm case with a large sensor cluster; not a subtle watch
- Mineral crystal rather than sapphire
- Left-side crown and pushers take getting used to
- A polyurethane strap, not a bracelet, as standard
Buy it if
Divers who want an analogue backup for depth and ascent rate, and anyone who wants a Promaster with a genuine instrument on the dial.
Skip it if
You want a diver that also passes as an office watch. Citizen’s plainer Promaster divers do the 200m job without the sensor housing.
FAQ
Yes. It is a functioning analogue depth gauge reading to 70 metres, with maximum-depth memory and a rapid-ascent alarm, according to Citizen’s product page. It is not a decorative sub-dial.
Sources
- Citizen Promaster Aqualand BN2038-01L, Citizen US product page
- Citizen Promaster Aqualand BN2038-01L, Long Island Watch listing
Researched and last updated 2026-09-03. We do not test watches in hand; every figure above is traceable to the manufacturer or the sources listed here.
Citizen Promaster Aqualand BN2038
Reference BN2038-01L · $500–$1,000
Prices and availability change; the band above is a research figure, so check the current listing.
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