THS-100 RS485 Temperature & Humidity Sensor

Overview

The THS-100 is a compact digital temperature and humidity sensor with an RS485 Modbus-RTU output. The sensing element and transmitter electronics sit inside the probe itself, so a single 4-wire cable carries both power and data. It measures -40 to +80°C at ±0.3°C and 0-100% RH at ±3% RH, refreshing every 2 seconds, with long-term drift under 0.1°C and 1% RH per year.

One sensor covers every climate point on a site. The same electronics are available in seven probe housings, from a fast-response vented cap for indoor air to sealed, sintered-metal, and IP67 options for rain, dust, and washdown conditions. Pick the housing per measurement point; wiring, specs, and communication stay identical.

One Sensor, Seven Probe Housings

Option	Housing	Dimensions	Best For
THS-100-PVC	Vented PVC cap	Ø12.5 × 68 mm	Indoor air, fastest response
THS-100-PP	Sealed polymer	Ø15 × 67 mm	High humidity and outdoor, rain and fog
THS-100-BR	Brass body	Ø15 × 68 mm	High humidity and outdoor, rain and fog
THS-100-SS	Stainless steel body	Ø15 × 76 mm	High humidity and outdoor, rain and fog
THS-100-SM57	Sintered metal filter	Ø14 × 57 mm	High-dust areas, fast response
THS-100-SM87	Sintered metal filter, long	Ø14 × 87 mm	High-dust areas
THS-100-IP67	IP67 sintered housing	Ø16.5 × 74 mm	Harsh and washdown environments

The vented cap gives the fastest response and suits dry indoor spaces. Sealed polymer, brass, and stainless housings keep working through rain, fog, and condensing humidity. Sintered metal filters protect the element in dusty barns, feed rooms, and grain stores, and the IP67 option handles washdown and harsh sites.

Key Features

• Wide range: -40 to +80°C, 0-100% RH
• Accurate and stable: ±0.3°C, ±3% RH, drift under 0.1°C and 1% RH per year
• RS485 Modbus-RTU: multi-drop bus wiring, cable runs up to 2000 m
• Seven probe housings: match the probe to the environment, same sensor everywhere
• Low power: 5-28 V DC supply at ≤0.05 W, reverse-polarity protected
• Field adjustable: address, baud rate, and reading offsets set over the bus

Installation

Mount the probe away from direct sunlight, heaters, and ventilation outlets, with free air movement around the filter cap. For outdoor ambient readings, place the probe in a radiation shield. In dusty or wet locations, choose the sintered or sealed housing rather than shielding a vented probe. Multiple sensors share one RS485 bus, each on its own Modbus address.

Connectivity and Integration

The RS485 Modbus-RTU output (9600 bps default, 8-N-1) connects directly to the Omni Genesis and Genesis Lite controllers and to any PLC or monitoring system that speaks Modbus. Readings arrive as simple scaled registers, and device address, baud rate, and calibration offsets are configurable over the same bus. This is the same modular approach as the rest of the Agrinovo range: one controller, any mix of sensors.