Powered hardware · SLS 3D printing + Injection molding

Bedroom climate monitor

Name: Bedroom climate monitor
Brand: benned
Availability: PreOrder

A true NDIR CO₂, temperature and humidity monitor on an e-ink display that emits no light at night, runs for months on one charge, and tells you why you woke up at four.

Configure

Order today and it arrives around 24 September.

Display size74 mmTwo stocked modules: 2.9 inch (74 mm) and 4.2 inch (104 mm). The bezel is a platform part, so this is a choice between two and not a slider.Body depth24 mmAnything from 16 to 46 mm is qualified for production.Wall thickness1.8 mmAnything from 1.2 to 3 mm is qualified for production.Sample interval10 Minutes between measurements. The NDIR sensor is what drains the battery, so this number decides the runtime more than the cell does.Material1.35 g/cm³, 110 MPa

It contains a lithium cell. Assembled, the cell ships as UN3481 (contained in equipment); loose in a kit it becomes UN3480, which express air does not carry at this volume. The sensor also needs a calibration cycle that only makes sense on a built unit.

Quantity1Tooling is amortised over our committed run of 3,000, so a single unit does not carry the whole mould.

€119per unit, incl. VAT · 8 working days

Reserve this build →

Generated specificationrev BED-0BAFGMH

8 working daysMade for your order · Air express, customs cleared

At this quantity this lane is also the cheaper one. A production run does not beat it at any quantity we offer.

96 × 72 × 24 mmBounding box

100 gMass

PA12 + 30% glass fibreSLS 3D printing

€119incl. VAT, from €51.47

Parts — what is stocked and what is made for you
Body	Made to order	SLS 3D printing
Display bezel	Stocked	Injection molding
Back plate	Made to order	SLS 3D printing
Delivered	Assembled	14 min of assembly included

Parameters
Display size	74 mm	74–104 mm
Body depth	24 mm	16–46 mm
Wall thickness	1.8 mm	1.2–3 mm
Sample interval	10	1–30

Computed
Runtime per charge (days)	91	target ≥ 60
Measurements per day	144
Light emitted at night	0
CO₂ accuracy (ppm)	40
Front face (mm)	96

Fits and tolerances — ISO 286, general dimensions ISO 2768-m (±0.3 mm)
Display into bezel	Ø74 H9/d9	clearance 0.1063–0.2548 mm · needs a secondary operation
Heat-set insert boss	Ø4.2 H9/d9	clearance 0.0301–0.0887 mm · needs a secondary operation

82Manufacturability
Buildable as specified

Display into bezel needs a secondary operation
H9/d9 at Ø74 mm asks for a tolerance the as-moulded process does not hold. Glass does not forgive a tight fit; d9 plus a foam gasket absorbs both the tolerance and the thermal movement.
→ Specify reaming or facing after the primary operation, and state it on the drawing.
The moulded version carries draft the printed one does not
Body prints without draft on the express lane, but injection molding needs 1° on every face parallel to the pull. Over a 90 mm wall that moves the surface by about 1.6 mm.
→ If the two must be interchangeable, design with draft from the start and accept it on the printed part too.
Ships assembled — not a choice we make
It contains a lithium cell. Assembled, the cell ships as UN3481 (contained in equipment); loose in a kit it becomes UN3480, which express air does not carry at this volume. The sensor also needs a calibration cycle that only makes sense on a built unit.

Cost breakdown, per unit across a run of 1

Material	€0.49
Process	€3.95
Components	€28.97	11
Assembly	€0.75
Tooling, amortised	€0.96
Scrap allowance	€2.11
Freight + handling	€12.49
Import duty	€1.75
Landed cost	€51.47	before margin and VAT

What is fixed, and what is yours

The parameters above move; the components do not. Every unit uses the same released bill of materials, from the same certified suppliers, because changing the electronics means repeating the certification — expensive, slow, and invisible to you. The freedom is in the geometry, which is the part you actually see and touch.

The parts that do not change — display bezel — are made in volume and held in stock, so their tooling is spread over every configuration we sell and their lead time is zero. body and back plate are made for your order by sls 3d printing. That split is the whole reason this can arrive in 8 working days instead of six weeks.

Bill of materials

Component	Supplier	Certification	Lead
ESP32-C6 module, pre-certified	Espressif ESP32-C6-WROOM-1	RED module certificate, CE, FCC, RoHS	30 d
CO₂ / temperature / humidity sensor	Sensirion SCD41 (alt: Senseair S8)	RoHS, REACH	40 d
E-ink display 2.9", 296×128	Good Display GDEY029T94	RoHS	40 d
LiPo cell 2000 mAh with protection	EVE (alt: Grepow)	IEC 62133-2, UN 38.3	35 d
1S protection board	Seiko/ABLIC	RoHS	25 d
USB-C receptacle, 16-pin, TID	Korean Hroparts	USB-IF TID, RoHS	30 d
USB-C cable 2 m, braided	Sinowell	USB-IF, RoHS	25 d
Brass heat-set insert M3 (set of 4)	Standard	RoHS	20 d
M3 stainless screws (set of 4)	Standard	RoHS	20 d
Silicone gasket, die-cut	Standard	REACH, LFGB	25 d
Rigid gift box, FSC board	Local printer	FSC	25 d

Compliance

This product class triggers 3 regulatory regimes. We are the manufacturer under EU law even though the factory is in China, so the declaration of conformity and the technical file are ours to hold — and to show you.

Trigger	Legal basis	Standards
USB powered (SELV)	EMC 2014/30/EU (SELV, so LVD does not apply below 50 V AC / 75 V DC)	EN 55032 Class B, EN 55035, EN IEC 63000 (RoHS)
Lithium-ion cell	Battery Regulation (EU) 2023/1542 + UN Model Regulations	IEC 62133-2, UN 38.3
Radio module	Radio Equipment Directive 2014/53/EU	EN 300 328 (2.4 GHz), EN 301 489, EN 62479 (RF exposure)