AR257 CO2, Humidity and Temperature Transmitter

SKU: AR257

Indoor air-quality transmitter measuring CO2 to 10,000 ppm, humidity 0-95% RH, and temperature -10 to 60 C, with dual analog outputs and RS485 Modbus RTU; optional display.

Qty:

Authorized Dealer

Calibration Available

Nationwide Shipping

Expert Support

Indoor air-quality transmitter measuring CO2 to 10,000 ppm, humidity 0-95% RH, and temperature -10 to 60 C, with dual analog outputs and RS485 Modbus RTU; optional display.

The Aplisens AR257 CO2, Humidity and Temperature Transmitter # AR257 is manufactured by Aplisens. Valley Instrument Service is an authorized Aplisens dealer offering full sales support, NIST-traceable calibration, and expert technical assistance.

Have questions about this product?

Our team can help with product selection, specs, pricing, and application support.

This product is part of a family with 5 models. Select a model below to view details.

Model	Description	Price
AR250	Relative humidity transmitter for HVAC and process monitoring with analog 4-20 mA / 0-10 V or RS485 Modbus outputs and optional display.	Request Quote	View Details →
AR252	Combined relative humidity and temperature transmitter with analog 4-20 mA / 0-10 V or RS485 Modbus outputs, integrated or remote probe, and optional display.	Request Quote	View Details →
AR257Current	Indoor air-quality transmitter measuring CO2 to 10,000 ppm, humidity 0-95% RH, and temperature -10 to 60 C, with dual analog outputs and RS485 Modbus RTU; optional display.	Request Quote	Viewing
AR253	Three-parameter transmitter: barometric pressure 300-1100 hPa, humidity 0-100% RH, temperature -30 to 80 C. Dual 4-20 mA or 0-10 V outputs plus RS485 Modbus RTU; computes dew point and absolute humidity; IP65 housing.	Request Quote	View Details →
AR258	Air-quality transmitter measuring suspended dust (PM, 1-1000 ug/m3) plus barometric pressure, humidity, and temperature. Dual analog outputs and RS485 Modbus RTU; optional display.	Request Quote	View Details →

Related Products

Aplisens

AR247 Temperature and Humidity Controller, Integrated Sensor

Temperature and humidity controller with integrated sensor (optional 1.5 m cable or stainless-tube probe) for heating/humidification and cooling/drying control. Range -30 to 80 C and 0-100% RH, PID with autotuning, three relay/SSR outputs, optional Modbus RTU.

Request Quote →