---
type: product
schema_version: 1
stock_number: "93879-2"
canonical_url: "https://www.artisantg.com/Scientific/93879-2/Vaisala-HMP231-Humidity-and-Temperature-Transmitter"
json_url: "https://www.artisantg.com/Scientific/93879-2/Vaisala-HMP231-Humidity-and-Temperature-Transmitter.json"
generated_at: "2026-11-07T01:22:31.060Z"
last_updated: "2026-10-24T19:05:41.350-05:00"
---

# Vaisala HMP231 Humidity and Temperature Transmitter

_Summary and Categories are this item's record. The description sections and FAQ are machine-assisted and can contain errors; where they disagree with the record, the record is correct, and where description sections disagree with each other, Details wins._

## Summary

- Manufacturer: Vaisala
- Model: HMP231
- Condition: Used and in Excellent Condition
- Price: Quote only
- Availability: Not in Stock
- Warranty: 1-Year Warranty with 30-Day Return Guarantee
- ITAR restricted: No
- Shipping weight: 3 lb, estimated
- Shipping dimensions: 8X8X3 in, estimated

## Categories

- Lab & Analytical > Analytical Instruments (primary)

## Details

This unit does not include cables.

### Configuration

- Transmitter Type: RH+T
- Display: Display on Transmitter Cover
- Probe Length: 120 mm
- Power Supply, Alarm Output, and Connectors: 24 V, No Connectors
- Serial Interface: RS 232C
- Sensor Protection: Sintered Stainless Steel Filter (16452)
- Analog Output Signals:
    - Channel 1: 4...20 mA
    - Channel 2: 4...20 mA
- Parameters for the Analog Outputs:
    - Channel 1: RH (0...100%RH)
    - Channel 2: T (-20...+60°C)
- Analog Output Range for Temperature: -20...+60°C
- Units: Non-Metric
- Regaining Option and Sensor Type: 1

Part Number: HMP231-A2A0A1AA12A2A1

## Images

- <https://www.artisantg.com/itemimages/vaisala_hmp231_view1_2022422145255.jpg>
- <https://www.artisantg.com/itemimages/vaisala_hmp231_view2_2022422145255.jpg>
- <https://www.artisantg.com/itemimages/vaisala_hmp231_view3_2022422145255.jpg>
- <https://www.artisantg.com/itemimages/vaisala_hmp231_view4_2022422145255.jpg>