The SensoScientific DP001/DP005 Differential Pressure Probe is made from ABS plastic and measure within ±0.25 or ±0.5 inWC. The high-accuracy sensor monitor bi-directional and unidirectional pressure as well as positive and negative air flow. Differential pressure probes are designed with two mounting slots for easy installation via screws or zip ties. Probes come equipped with an industrial-grade M8 connector that can be attached to any SensoScientific device and feature a metal fastener that ensures secure attachment. All probes are NIST traceable and calibrated from SensoScientific's A2LA Accredited Calibration Laboratory. Certificates of calibration can be found on the SensoScientific Cloud for immediate use.