---
product_id: 12564743
title: "TPI 621 Dual Differential Input Manometer, 5 Digit LCD, +/-0.5 percent Accuracy, 0.01\" H2O Resolution, +/-120\" H2O Range"
brand: "tpi"
price: "4499 kr"
currency: NOK
in_stock: true
category: "Tpi"
url: https://www.desertcart.no/products/12564743-tpi-621-dual-differential-input-manometer-5-digit-lcd-0
store_origin: NO
region: Norway
---

# 0.001 inH2O ultra-fine resolution +/-0.5% precision accuracy Temperature compensated readings TPI 621 Dual Differential Input Manometer, 5 Digit LCD, +/-0.5 percent Accuracy, 0.01" H2O Resolution, +/-120" H2O Range

**Brand:** tpi
**Price:** 4499 kr
**Availability:** ✅ In Stock

## Summary

> ⚙️ Precision that powers your professional edge

## Quick Answers

- **What is this?** TPI 621 Dual Differential Input Manometer, 5 Digit LCD, +/-0.5 percent Accuracy, 0.01" H2O Resolution, +/-120" H2O Range by tpi
- **How much does it cost?** 4499 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/12564743-tpi-621-dual-differential-input-manometer-5-digit-lcd-0)

## Best For

- tpi enthusiasts

## Why This Product

- Trusted tpi brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Robust metal and plastic build with RoHS compliance ensures durability and eco-conscious use.
- • **Stability Mode:** Trim mode locks in stable readings, eliminating guesswork during critical adjustments.
- • **Multi-Unit Mastery:** Switch seamlessly between 7 pressure units including PSI, mbar, and mmHg for versatile diagnostics.
- • **Pinpoint Precision:** Achieve ultra-fine 0.001 inH2O resolution for flawless furnace and boiler tuning.
- • **Smart Power Management:** Auto power-off after 20 minutes saves battery life so you’re always ready on the job.

## Overview

The TPI 621 Dual Differential Input Manometer delivers industry-leading accuracy with 0.001 inH2O resolution and +/-0.5% precision, temperature-compensated for consistent results. Featuring seven pressure units and a trim mode for stable readings, it’s engineered for high-efficiency furnace and boiler adjustments. Compact, durable, and energy-efficient, it’s the essential tool for HVAC pros demanding flawless performance.

## Description

High efficiency gas and oil fired furnaces along with condensing boilers require a manometer with 0.001 inches of water resolution to make proper adjustments. 0.001 inH2O resolution at less than 40 inH2O; 0.01 inH2O resolution over 40 inH2O. Temperature compensated to ensure repeatable measurements. Seven units of pressure: inH2O, mbar, KPa, PSI, mmH2O, mmHg, . Trim mode to stabilize readings. Auto power off after 20 minutes. +/- 0.2 percent accuracy. 300mbar over pressure. 32 to 104 degree F operating temperature. RoHS compliant.

## Features

- High efficiency gas and oil fired furnaces along with condensing boilers require a manometer with 0.001 inches of water resolution to make proper adjustments
- 0.001 inH2O resolution at less than 40 inH2O; 0.01 inH2O resolution over 40 inH2O
- Temperature compensated to ensure repeatable measurements
- Seven units of pressure: inH2O, mbar, KPa, PSI, mmH2O, mmHg,
- Trim mode to stabilize readings

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004XW6ENI |
| Best Sellers Rank | #991,977 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,586 in Multi Testers |
| Brand Name | TPI |
| Customer Reviews | 4.5 4.5 out of 5 stars (7) |
| Global Trade Identification Number | 00637623006210 |
| Item Dimensions | 11.75 x 7.25 x 2.25 inches |
| Item Weight | 16 ounces |
| Manufacturer | Test Products International, Inc |
| Material Type | Metal, Plastic |
| Model | 621 |
| Number of Items | 1 |
| Part Number | 621 |
| UPC | 637623006210 |
| Unit Count | 1 Count |
| Warranty Description | No Warranty |

## Product Details

- **Brand:** TPI
- **Item Weight:** 16 ounces
- **Item dimensions L x W x H:** 11.75 x 7.25 x 2.25 inches
- **Material:** Metal, Plastic
- **Number of Items:** 1

## Images

![TPI 621 Dual Differential Input Manometer, 5 Digit LCD, +/-0.5 percent Accuracy, 0.01" H2O Resolution, +/-120" H2O Range - Image 1](https://m.media-amazon.com/images/I/21YbEklkG4L.jpg)
![TPI 621 Dual Differential Input Manometer, 5 Digit LCD, +/-0.5 percent Accuracy, 0.01" H2O Resolution, +/-120" H2O Range - Image 2](https://m.media-amazon.com/images/I/21kDPqdNBML.jpg)
![TPI 621 Dual Differential Input Manometer, 5 Digit LCD, +/-0.5 percent Accuracy, 0.01" H2O Resolution, +/-120" H2O Range - Image 3](https://m.media-amazon.com/images/I/31q6xbyWYCL.jpg)

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**Shop now:** [https://www.desertcart.no/products/12564743-tpi-621-dual-differential-input-manometer-5-digit-lcd-0](https://www.desertcart.no/products/12564743-tpi-621-dual-differential-input-manometer-5-digit-lcd-0)

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-09-16*