Delta Ohm

HD48S01ETO1 relative humidity transmitter with MODBUS output and extended working temperature range

chen.fz@otm.sg Instrumentation , 0 Comment
Related instruments Temperature & humidity

Shown below is an HD48S01ETO1 relative humidity transmitter with MODBUS output and extended working temperature range.

The key specifications include:

  • Humidity measurement range: 0 – 100%RH
  • Working temperature range: -40 – 150 °C (probe); -20 – 60 °C (electronics)
  • Probe length: 135 mm
  • Output type: MODBUS-RTU

Particulate matter (PM1.0, PM2.5 & PM10) measurement with PMsense and wireless data logger

chen.fz@otm.sg Instrumentation , , , , 0 Comment
Related instruments Weather stations, Wireless & web data loggers, Air quality sensors

A system was integrated by OTM for construction site particulate matter (PM1.0, PM2.5 & PM10) measurement, with the following components:

  • Delta Ohm PMsense-M particulate matter transmitter with MODBUS-RTU output
  • Delta Ohm HD35EDW-MB wireless data logger supporting MODBUS-RTU output

Listed below are the key specifications:

  • PM measuring principle: laser scattering
  • Calibration certificate can be provided on additional cost
  • Measuring range: 0 – 1000 μg/m3 for each component
  • IP67 protection for both transmitter and data logger, suitable for outdoor installation
  • Wireless connection between data logger and base unit
Left: PMsense-M, right: HD35EDW-MB
Software screenshot