---
lang: "en"
title: "TSM400-1-CP 1-Wire Carbon Dioxide Sensor"
sku: "TSM400-1-CP"
canonical_url: "https://shop.marcomweb.it/en/1-wire/tsm400-1-cp-1-wire-carbon-dioxide-sensor"
brand: "MARCOM S.r.l."
end_of_life: "false"
---

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TSM400-1-CP is a carbon dioxide and barometric pressure sensor with a 1-Wire interface

TSM400-1-CP is a multiparameter sensor supporting the 1-Wire protocol. The sensor measures carbon dioxide concentration and atmospheric pressure. Both primary sensing elements, for carbon dioxide and pressure, used in the device are digital. This ensures high measurement accuracy and long-term stability. The primary sensing element for atmospheric pressure is factory calibrated and does not require recalibration during its life cycle. Auto-calibration is available for carbon dioxide measurements. This is performed if the sensor is left in fresh air (approx. 400 ppm CO2 concentration). TSH400-1-CP is housed in a slim plastic enclosure. The bottom part of the enclosure is suitable for installation on standard ø68 mm flush-mounted / drywall boxes, with a fixing hole spacing of 61 mm.

High levels of carbon dioxide reduce productivity, increase blood pressure, cause headaches, and in very high doses, can be life-threatening. This is why controlling carbon dioxide levels is important for offices, workplaces, schools, and other public buildings.

## Technical Specifications

- LED indicator for communication status
- Excellent long-term stability
- Auto-calibration in fresh air for carbon dioxide measurements
- Firmware update via the interface
- Relatively low current consumption
- Unique 64-bit serial number for multiple sensor support
- Operating temperature: -20 to 60°C
- Operating relative humidity: 5 to 95% (non-condensing)
- Storage temperature: -20 to 60°C
- Protection degree: IP20
- Current consumption: 25 mA @ 5VDC (Peak: 150 mA @ 5VDC)
- CO2 measurement range: 400 to 5000 ppm
- CO2 measurement accuracy: ± (40 ppm + 5 %)
- Pressure measurement range: 10 to 1200 hPa
- Pressure measurement accuracy (min.): ±1.5 (25°C, 750 hPa)
- Pressure measurement accuracy (max.): ±2.5 (-20°C to + 85°C, 300 to 1100 hPa)
- Dimensions: 81 x 81 x 30 mm
- Weight: 66 g

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Source: https://shop.marcomweb.it/en/1-wire/tsm400-1-cp-1-wire-carbon-dioxide-sensor

MARCOM S.r.l. — a trusted supplier for industrial automation and building automation.