---
product_id: 2171028
title: "Fieldpiece ARH4 Digital Sling Psychrometer Accessory Head"
price: "R$55"
currency: BRL
in_stock: false
reviews_count: 8
url: https://www.desertcart.com.br/products/2171028-fieldpiece-arh4-digital-sling-psychrometer-accessory-head
store_origin: BR
region: Brazil
---

# Logs RH & Temp over time 85-hour battery life with APO Measures Temp & RH % precisely Fieldpiece ARH4 Digital Sling Psychrometer Accessory Head

**Price:** R$55
**Availability:** ❌ Out of Stock

## Summary

> 🌟 Elevate your HVAC game with precision you can trust!

## Quick Answers

- **What is this?** Fieldpiece ARH4 Digital Sling Psychrometer Accessory Head
- **How much does it cost?** R$55 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/2171028-fieldpiece-arh4-digital-sling-psychrometer-accessory-head)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Seamless Integration:** Snaps directly onto Fieldpiece meters and data loggers for instant, reliable readings.
- • **Dual Unit Flexibility:** Switch effortlessly between English and Metric units to suit your project or client needs.
- • **Extended Battery Life:** Auto Power-Off with override ensures up to 85 hours of uninterrupted field use—no downtime, no hassle.
- • **Precision Climate Metrics:** Accurately measures temperature, relative humidity, dew point, and wet bulb for flawless HVAC diagnostics.
- • **Data-Driven Troubleshooting:** Logs and converts environmental data into voltage signals for advanced superheat and system analysis.

## Overview

The Fieldpiece ARH4 Digital Sling Psychrometer Accessory Head is a professional-grade tool designed for HVAC technicians and engineers. It measures temperature and relative humidity, calculates dew point and wet bulb temperatures, and logs data over time. Compatible with Fieldpiece meters, it supports both English and Metric units and features an 85-hour battery life with auto power-off, making it an essential accessory for accurate superheat calculations and system troubleshooting.

## Description

The Fieldpiece model ARH4 Digital Sling Psychomotor Accessory Head measures both relative humidity and ambient air temperature. It calculates dew point and wet bulb. It's great for calculating target superheat as well as logging -Percent RH, temp, WB or DP over time. The head converts -Percent RH, ambient temperature, dew point temperature, and wet bulb temperature to a voltage at a rate of 1 -Percent RH or Degree to 1mVDC and your reading is displayed on your meter. The ARH4 snaps directly onto Fieldpiece stick meters, data logger, electronic handles and adapters.

## Features

- Measures Temp and RH percent
- Calculates wet bulb and dew point temperatures
- Get outdoor dry bulb and indoor wet bulb for target superheat calculations
- Log relative humidity over time and troubleshoot systems
- English and Metric units

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Fieldpiece |
| Part Number | ARH4 |
| Item Weight | 8.8 ounces |
| Product Dimensions | 6.25 x 2.25 x 11 inches |
| Item model number | ARH4 |
| Batteries | 1 9V batteries required. (included) |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Special Features | Auto Power-Off (APO) to extend battery life, with override switch for data logging and extended test times; Included: Digital Sling Psychrometer and Hygrometer Accessory - ARH4, 9V battery (installed), Operator’s manual |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Average Battery Life | 85 Hours |

## Images

![Fieldpiece ARH4 Digital Sling Psychrometer Accessory Head - Image 1](https://m.media-amazon.com/images/I/51gqbitmqgL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by J***L on May 6, 2015*



### ⭐⭐⭐⭐ Review
*by Z***S on June 21, 2018*



### ⭐⭐⭐⭐⭐ Review
*by C***F on November 22, 2012*



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**Shop now:** [https://www.desertcart.com.br/products/2171028-fieldpiece-arh4-digital-sling-psychrometer-accessory-head](https://www.desertcart.com.br/products/2171028-fieldpiece-arh4-digital-sling-psychrometer-accessory-head)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-05-24*