--- product_id: 16904815 title: "Sper Scientific 736740 Mason's Hygrometer" brand: "sper scientific" price: "AED 117" currency: AED in_stock: true reviews_count: 11 category: "Sper Scientific" url: https://www.desertcart.ae/products/16904815-sper-scientific-736740-masons-hygrometer store_origin: AE region: United Arab Emirates --- # Wet/dry bulb tech for precise humidity Safe, vivid red liquid display Dual temp scales (-10/50°C & 10/120°F) Sper Scientific 736740 Mason's Hygrometer **Brand:** sper scientific **Price:** AED 117 **Availability:** ✅ In Stock ## Summary > 🌡️ Stay ahead of the climate curve with precision you can see! ## Quick Answers - **What is this?** Sper Scientific 736740 Mason's Hygrometer by sper scientific - **How much does it cost?** AED 117 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ae](https://www.desertcart.ae/products/16904815-sper-scientific-736740-masons-hygrometer) ## Best For - sper scientific enthusiasts ## Why This Product - Trusted sper scientific brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Mercury-Free Safety:** Bright red liquid ensures safe, easy-to-read measurements without toxic mercury. - • **Battery-Free Operation:** Eco-friendly and always ready—no batteries required for uninterrupted use. - • **Compact Tabletop Design:** Lightweight and portable, perfect for your workspace or field measurements. - • **Dual Temperature Scales:** Seamlessly switch between Celsius and Fahrenheit for global versatility. - • **Precision Humidity Measurement:** Wet bulb and dry bulb readings deliver accurate humidity data you can trust. ## Overview The Sper Scientific 736740 Mason's Hygrometer uses classic wet/dry bulb technology with a safe red liquid indicator to provide accurate humidity readings. Featuring dual temperature scales (-10/50°C and 10/120°F), it operates battery-free and offers a compact tabletop design ideal for professionals needing reliable environmental data. ## Description Measure Humidity - Mason's Hygrometer - Red Liquid. One thermometer bulb is kept constantly wet by a siphon reservoir while the other gives a dry temperature reading. Humidity is obtained by comparing the two readings on the enclosed chart. The red liquid masons hygrometer uses a safe and easy to read red liquid in place of the usual mercury. Dual scales of -10/50°C and 10/120°F. Review: Work very well - They are well calibrated (accurate). Suggest using and comparing to the mechanical versions - the error is amazing to watch (wet/dry bulb very accurate$ Review: Kind of cheap, but it does work - One just has to be careful w/this device. The bottle is so small, the water there evaporates in a few days. ## Features - Measure Humidity - Mason's Hygrometer - Red Liquid - Dual scales of -10/50°C and 10/120°F - High quality - Red Liquid ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00N5IRZS4 | | Battery Description | No batteries required | | Best Sellers Rank | #165,087 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #78 in Weather Hygrometers | | Brand | Sper Scientific | | Brand Name | Sper Scientific | | Color | White | | Customer Reviews | 3.7 out of 5 stars 40 Reviews | | Included Components | Hygrometer | | Item Weight | 3.8 ounces | | Manufacturer | Sper Scientific | | Model | 736740 | | Mounting Type | Tabletop | | Number of Items | 1 | | Part Number | 736740 | | Temperature Accuracy | 5.56 | | UPC | 077754662617 696738569263 | | Unit Count | 1 Count | | Upper Temperature Range | 120 °F | | Upper Temperature Rating | 120 °F | ## Product Details - **Battery Description:** No batteries required - **Brand:** Sper Scientific - **Color:** White - **Item Weight:** 3.8 Ounces - **Mounting Type:** Tabletop ## Images ![Sper Scientific 736740 Mason's Hygrometer - Image 1](https://m.media-amazon.com/images/I/51pLwX2A6YL.jpg) ![Sper Scientific 736740 Mason's Hygrometer - Image 2](https://m.media-amazon.com/images/I/71RKhd4w5NL.jpg) ![Sper Scientific 736740 Mason's Hygrometer - Image 3](https://m.media-amazon.com/images/I/81yJbN2IYrL.jpg) ![Sper Scientific 736740 Mason's Hygrometer - Image 4](https://m.media-amazon.com/images/I/71bHRjbwoeL.jpg) ![Sper Scientific 736740 Mason's Hygrometer - Image 5](https://m.media-amazon.com/images/I/81rQ25J+t0L.jpg) ## Questions & Answers **Q: How often do you need to refill the bottle at different humidity levels?** A: Please note I added a 30mm fan to move air across the wick. With humidity the 45% range and the fan operating, I need to add water about every 4 days. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Work very well *by R***T on July 31, 2026* They are well calibrated (accurate). Suggest using and comparing to the mechanical versions - the error is amazing to watch (wet/dry bulb very accurate$ ### ⭐⭐⭐⭐ Kind of cheap, but it does work *by K***N on November 22, 2021* One just has to be careful w/this device. The bottle is so small, the water there evaporates in a few days. ### ⭐⭐⭐⭐⭐ A good instrument/good price *by D***. on May 19, 2016* A good instrument/good price, seems accurate and is easy to use. Some say it looks cheap due to the plastic but the plastic is tough ## Frequently Bought Together - Sper Scientific 736740 Mason's Hygrometer - Apera Instruments Premium-Series PH60S Food pH Pocket Tester Kit, Swiss Spear pH Electrode, ±0.01 pH Accuracy, -2.00-16.00 pH Range (AI313) - Weigh Boats Medium (100ml, 125 Pack) Disposable Plastic Trays for Scale, Anti-Static Square Tray Weighing Dishes, Polystyrene Lab Dish for Powder Weight, Mixing Epoxy, Food Sample Container, Pour Boat --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.ae/products/16904815-sper-scientific-736740-masons-hygrometer](https://www.desertcart.ae/products/16904815-sper-scientific-736740-masons-hygrometer) --- *Product available on Desertcart United Arab Emirates* *Store origin: AE* *Last updated: 2026-08-23*