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The Vaisala Indigo520 supports two detachable probes simultaneously. The Indigo520 is compatible with Indigo probes that measures humidity, temperature, dew point, carbon dioxide, hydrogen peroxide, and moisture in oil measurements. The Indigo520 can also measure barometric pressure with an additional module.
Choose the humidity measurement probe that best suits your needs:
- • HMP1 for laboratories
- • HMP3 with a field replaceable sensor for general use
- • HMP7 for demanding, high-humidity industrial and meteorology applications
- • HMP9 for confined spaces
- • TMP1 for temperature measurement only
Indigo Compatible Probes
| Measurement type | Probe models |
| Humidity and temperature | HMP1, HMP3, HMP4, HMP5, HMP7, HMP8, HMP9 |
| Temperature | TMP1 |
| Dew point | DMP5, DMP6, DMP7, DMP8 |
| CO2 | GMP251, GMP252 |
| Vaporized hydrogen peroxide | HPP271, HPP272 |
| Moisture in oil | MMP8 |
Other Compatible Devices
| Device or series | Models |
| MHT410 Moisture, Hydrogen and Temperature Transmitter | MHT410 |
Measurement Performance
| Barometric pressure (optional module) | |
| Pressure range | 500 … 1100 hPa |
| Class A: | |
| Linearity | ±0.05 hPa |
| Hysteresis | ±0.03 hPa |
| Repeatability | ±0.03 hPa |
| Calibration uncertainty | ±0.07 hPa |
| Accuracy at +20 °C / +68 °F | ±0.10 hPa |
| Temperature dependence | ±0.1 hPa |
| Total accuracy (-40 … +60 °C / -40 … +140 °F) | ±0.15 hPa |
| Long-term stability/year | ±0.1 hPa |
| Response time (100 % response): | |
| One sensor | 2 s |
| Pressure units | hPa, mbar, kPa, Pa, inHg, mmH20, mmHg, torr, psia |
Mechanical Specifications
| NEMA rating | NEMA 4 |
| Housing classification | IK08, DIN EN ISO 11997-1: Cycle B (VDA 621-415) |
| Housing material | AlSi10Mg (DIN 1725) |
| Display window material | Strengthened glass (IK08) |
| Display size | 5 in |
| Weight | 1.5 kg (3.3 lb) |
| Dimensions (H × W × D) | 142 × 182 × 67 mm (5.63 × 7.17 × 2.64 in) |
| Cable diameters for cable glands | |
| M20×1.5 glands | 5.0 … 8.0 mm (0.20 … 0.31 in) |
| M20×1.5 glands with split bushing | 7 mm (0.28 in) |
| M16×1.5 glands | 2.0 … 6.0 mm (0.08 … 0.24 in) |
Inputs and Outputs
| Operating power 1) | |
| Protective extra-low voltage (PELV) version | 15 … 35 V DC, 24 V AC ±20 % 50/60 Hz, max. current 2 A (power supply input is galvanically isolated) Fuse size for power supply: 3 A Isolation voltage: 500 V AC, 1000 V DC |
| PELV power cable temp. rating | ≥ +80 °C (+176 °F) |
| AC (mains) power version | 100 … 240 V AC 50/60 Hz, max. current 1 A (power supply input is galvanically isolated) Fuse size for power supply: 10 A Isolation voltage: 1500 V AC |
| Power over Ethernet version | Power over Ethernet (PoE) IEEE 802.3at Type 2 Class 4 Max. current 600 mA, max. power consumption 25.5 W Isolation voltage: 500 V AC, 1000 V DC |
| Analog outputs | |
| Number of analog outputs | 4 |
| Selectable voltage output types | 0 … 1 V, 0 … 5 V, 0 … 10 V, scalable |
| Selectable current output types | 4 … 20 mA, 0 … 20 mA, scalable |
| Max. wire size | 2.5 mm2 (14 AWG) |
| Accuracy of analog outputs at +20 °C (+68 °F) | ±0.05 % full scale |
| Temperature dependence | ±0.005 % / °C full scale |
| External loads: | |
| Current outputs | RL < 500 Ω |
| 0 … 1 V output | RL > 2 kΩ |
| 0 … 5 V and 0 … 10 V outputs | RL > 10 kΩ |
| Relay outputs | |
| Number and type of relays | 2 pcs, SPDT |
| Max. switching power, current, voltage | 30 W, 1 A, 40 V DC / 28 V AC |
| Max. wire size in PELV version | 2.5 mm2 (14 AWG) |
| Max. wire size in AC (mains) version | 1.5 mm2 (16 AWG) |
| Ethernet interface | |
| Supported standards | 10BASE-T, 100BASE-TX |
| Connector | 8P8C (RJ45) |
| Supported protocols | Modbus TCP/IP (port 502), HTTPS (port 8443) |
1) The power supply option is selected when ordering the transmitter.
Operating Environment
| For use in wet locations | Yes |
| Operating humidity | 0 … 100 %RH |
| Maximum operating altitude | 3000 m (9843 ft) |
| IP rating | IP66 1) |
| Operating temperature | |
| With display | -20 … +55 °C (-4 … +131 °F) |
| Without display | -40 … +60 °C (-40 … +140 °F) |
| Without display with barometer module | -40 … +55 °C (-40 … +131 °F) |
| Storage temperature | |
| With display | -30 … +60 °C (-22 … +158 °F) |
| Without display | -40 … +60 °C (-40 … +140 °F) |
1) Evaluated by Eurofins, not by UL
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