- Relative humidity measurement range: 5…95 % RH, accuracy ±3.0 %
- Temperature measurement range: 0…+50 °C, accuracy ±0.5 °C
- Three output signal options: RS-485 (Modbus RTU), 4–20 mA current loop, 0–10 V voltage
- Power supply: 10–30 V DC for RS-485 model; 14–30 V DC for analog models
- USB Type-C service port — configure with akYtec ToolPro; works as power supply for bench setup
- Duplicated terminal blocks — easy daisy-chain (bus topology) wiring without additional connectors
- Quick-release snap-fit cover — installs on wall bracket or standard 60 mm socket box
- LED status indicator: green = operating normally; red = fault; flashing patterns indicate out-of-range conditions
- Compact: 82 × 80 × 22.5 mm, weight ≤ 0.1 kg
- IP20 enclosure, V2 flammability rating
- Mean time between failures: ≥ 50 000 h; average service life: ≥ 7 years
- Certified measurement accuracy across the full conversion range
- One product family covers all common output signal types — simplifies procurement and spares
- Compatible with akYtec ToolPro, akYtec Cloud, and any Modbus RTU master
- Fast delivery within Europe
- 2-year warranty
- HVAC and building management systems
- Office and residential humidity monitoring
- Warehouse and cold storage environmental control
- Medical and pharmaceutical storage facilities
- Food production and storage quality control
- Server rooms and data centres
Measuring medium
Non-aggressive gaseous media free of corrosive vapors and gases (e.g. air, nitrogen).
Key Technical Features
Why choose IMS20-B
Operating conditions
Indoor closed explosion-safe premises without corrosive vapors or gases. Ambient temperature 0…+50 °C, relative humidity 5…95 % (non-condensing), atmospheric pressure 84.0…106.7 kPa.
Power Supply
|
Parameter |
Value |
|
Power supply voltage — IMS20-B.485 |
24 (10…30) V DC |
|
Power supply voltage — IMS20-B.420 / IMS20-B.010 |
24 (14…30) V DC |
|
Power consumption, max. |
1 W |
Measurement Channels
|
Parameter |
Value |
|
Conversion function |
Linear |
|
Relative humidity range |
5…95 % |
|
Relative humidity accuracy |
±3.0 % |
|
Temperature range |
0…+50 °C |
|
Temperature accuracy |
±0.5 °C |
|
Warm-up time, max. |
30 s |
RS-485 Interface (IMS20-B.485 only)
|
Parameter |
Value |
|
Communication protocol |
Modbus RTU |
|
Baud rate |
1200…115 200 bit/s |
|
Line length, max. |
1200 m |
Analog Outputs
|
Parameter |
Value |
|
DC current signal range — IMS20-B.420 |
4…20 mA |
|
Load resistance, max. — IMS20-B.420 |
1000 Ω |
|
DC voltage signal range — IMS20-B.010 |
0…10 V |
|
Load resistance, min. — IMS20-B.010 |
2000 Ω |
USB-Device Interface
|
Parameter |
Value |
|
Number of ports |
1 |
|
USB standard |
USB 2.0 |
|
Communication protocol |
Modbus RTU |
|
Cable length, max. |
3 m |
Mechanical
|
Parameter |
Value |
|
Dimensions |
(82 × 80 × 22.5) ±2 mm |
|
IP code |
IP20 |
|
Flammability rating |
V2 |
|
Weight, max. |
0.1 kg |
Reliability
|
Parameter |
Value |
|
Mean time between failures |
≥ 50 000 h |
|
Average service life |
≥ 7 years |
Environmental Conditions
|
Parameter |
Value |
|
Ambient temperature |
0…+50 °C |
|
Relative humidity |
5…95 % (non-condensing) |
|
Atmospheric pressure |
84.0…106.7 kPa |
Dimensional drawing — front, side, rear with dimensions in mm
Connection diagram: RS-485 bus topology, multiple devices
Connection diagram: 4–20 mA
Connection diagram: 0–10 V
- What is the difference between IMS20-B and IMS20-D?
- Which output signal should I choose?
- Can I configure the device without an RS-485 master?
- How many IMS20-485 devices can I connect to one RS-485 bus?
- What Modbus registers contain the humidity and temperature values?
- Is the device suitable for outdoor installation?
- What is the measuring principle for humidity?