--- product_id: 294392118 title: "(BT41BL) : 220V Din Rail Mount Digital Timer 40-Group Time-Controlled Ringer Timer School Bell Relay" brand: "blackt electrotech" price: "£17.68" currency: GBP in_stock: true reviews_count: 8 category: "Blackt Electrotech" url: https://www.desertcart.co.uk/products/294392118-bt41bl-220v-din-rail-mount-digital-timer-40-group-time store_origin: GB region: United Kingdom --- # 1.6-inch large clear display 10,000+ electrical life cycles 40 programmable time groups (BT41BL) : 220V Din Rail Mount Digital Timer 40-Group Time-Controlled Ringer Timer School Bell Relay **Brand:** blackt electrotech **Price:** £17.68 **Availability:** ✅ In Stock ## Summary > ⏰ Automate your day, never miss a beat! ## Quick Answers - **What is this?** (BT41BL) : 220V Din Rail Mount Digital Timer 40-Group Time-Controlled Ringer Timer School Bell Relay by blackt electrotech - **How much does it cost?** £17.68 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/294392118-bt41bl-220v-din-rail-mount-digital-timer-40-group-time) ## Best For - blackt electrotech enthusiasts ## Why This Product - Trusted blackt electrotech brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Boost Efficiency & Punctuality:** Eliminate manual errors and keep your operations running like clockwork every time. - • **Crystal Clear 1.6-Inch Display:** Large, easy-to-read screen ensures quick setup and effortless monitoring. - • **Built to Last Over 10,000 Cycles:** Engineered for durability, guaranteeing years of reliable, maintenance-free operation. - • **Versatile Industrial & Educational Use:** Perfect for schools, factories, street lighting, and more—automate your day with confidence. - • **Master Your Schedule with 40 Time Groups:** Set up to 40 precise start times for seamless automation and ultimate control. ## Overview The Blackt Electrotech BT41BL is a robust 220V DIN rail mount digital timer featuring 40 programmable time groups and a large 1.6-inch display. Designed for schools, factories, and industrial applications, it offers precise, reliable automation with a long electrical lifespan exceeding 10,000 cycles, ensuring consistent performance and operational efficiency. ## Description Product Description Precise Time Control for School & Industrial Applications The Blackt Electrotech (BT41BL) 220V DIN Rail Mount Digital Timer is engineered to deliver accurate and reliable automatic switching for bells, alarms, and sirens. Perfect for schools, factories, and institutions, this timer allows you to set up to 40 different time programs for fully automated operations, ensuring punctuality and efficiency every day. Ideal for Bells, Alarms & Automation Systems From school bells to factory shift sirens and other automated control applications, the BT41BL is a versatile and dependable solution. Its precise scheduling helps maintain discipline, reduce manual workload, and ensure operations run like clockwork. Durable Build with Long-Lasting Performance Crafted from high-quality, industrial-grade components, this digital timer delivers consistent performance even under demanding conditions. It is built to handle regular daily operations for years without performance degradation. Review: Good product - Good Review: Difficult to install - Not good difficult to set you won't understand anything never buy it going to return it ## Features - Long life, no less than 10,000 times of electrical life. - Set the start clock of each group, the running time of each group is the same, the setting range is 1-99 seconds. - 1.6 Inch large screen display, the reading is more convenient and clear. - Ideal for schools and other institutions requiring timed activities such as school bell ringing, production schedules, and more. - Can be used for street lights, factories, advertising signs, production equipment, radio and television equipment, stage and other power equipment that needs to be turned on and off regularly. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08BFNDDVG | | Best Sellers Rank | #18,197 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #20 in Timers | | Brand | Blackt Electrotech | | Colour | White | | Country of Origin | China | | Customer Reviews | 3.8 out of 5 stars 41 Reviews | | Display Size | 1.6 Inches | | Enclosure Material | Plastic | | Manufacturer | Blackt Electrotech | | Material | Plastic | | Net Quantity | 1.0 Count | | Number of settings | 40 | | Screen Size | 1.6 Inches | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Blackt Electrotech - **Colour:** White - **Material:** Plastic - **Number of settings:** 40 - **Screen Size:** 1.6 Inches ## Images ![(BT41BL) : 220V Din Rail Mount Digital Timer 40-Group Time-Controlled Ringer Timer School Bell Relay - Image 1](https://m.media-amazon.com/images/I/61IEqrXN-4L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good product *by M***M on 4 February 2026* Good ### ⭐ Difficult to install *by P***Y on 13 March 2026* Not good difficult to set you won't understand anything never buy it going to return it ### ⭐⭐⭐⭐⭐ बहुत ही अच्छा प्रोडक्ट *by N***M on 29 February 2024* किमत थोड़ी ज्यादा है पर प्रोडक्ट बहुत अच्छा है ## Frequently Bought Together - Blackt Electrotech : 220V Din Rail Mount Digital Timer 40-Group Time-Controlled Ringer Timer School Bell Relay White - Blackt Electrotech BT41DW 30 Amps Digital Timer Switch Relay DIN Rail, Programmable Automatic On/Off (Single-Phase Waterproof) - Blackt Electrotech BT31P2 White Water Proof 230Volt Auto Day/Night on and Off Photocell, Ldr Sensor Switch for Lighting (5 Pic Pack) --- ## 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.co.uk/products/294392118-bt41bl-220v-din-rail-mount-digital-timer-40-group-time](https://www.desertcart.co.uk/products/294392118-bt41bl-220v-din-rail-mount-digital-timer-40-group-time) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-05*