Tempsens Instruments, a name few outside industrial circles would recognise but one that quietly holds a leading share of India’s temperature sensor market, has drawn one of the sharpest grey market rallies among this week’s mainboard IPOs. The issue closes today, and its GMP has more than tripled since subscription opened, now pointing to a listing gain estimate of roughly 100 percent over the upper price band.
Here is a complete breakdown of the price band, key dates, the company’s business, and what the current GMP trend actually suggests, along with how any listing day gains would be taxed if you decide to sell.
Tempsens Instruments IPO Key Details at a Glance
| Detail | Information |
|---|---|
| IPO Dates | August 20 to August 24, 2026 |
| Price Band | ₹285 to ₹300 per share |
| Lot Size | 50 shares |
| Minimum Investment | ₹15,000 (at upper band) |
| Issue Size | ₹650 crore (₹95 crore fresh issue + ₹555 crore OFS) |
| Allotment Date | August 25, 2026 |
| Listing Date | August 28, 2026 |
| Exchanges | BSE, NSE |
| Lead Manager | ICICI Securities Ltd. |
| Registrar | Kfin Technologies Ltd. |
What Is Tempsens Instruments IPO GMP Today
As of the morning of August 24, 2026, the final day of bidding, the Tempsens Instruments IPO GMP stands at ₹300 per share. At the upper price band of ₹300, this indicates an estimated listing price of around ₹600, a potential listing premium of 100 percent. This is one of the stronger GMP readings among recent mainboard IPOs, and it has climbed with unusual consistency through the bidding window.
GMP Trend Since Mid-August
| Date | GMP (₹) |
|---|---|
| August 15 | ₹85 |
| August 16 | ₹65 |
| August 17 | ₹154 |
| August 18 | ₹172 |
| August 19 | ₹175 |
| August 20 | ₹270 |
| August 21 | ₹277 |
| August 24 | ₹300 |
The dip between August 15 and 16, followed by a sharp and sustained climb from August 17 onward, lines up closely with the IPO’s official price band announcement and the start of active bidding, both of which typically firm up grey market sentiment once investors have concrete numbers to work with rather than speculation.
About Tempsens Instruments (India) Limited
Incorporated in 1990, Tempsens Instruments is a thermal engineering and specialised cable manufacturer based in Vadodara, Gujarat. The company designs and manufactures temperature sensing solutions, electrical heating systems, and specialised cables for industrial process industries, holding an estimated 10.5 percent market share in India’s temperature sensor segment by revenue.
Product Range and Global Reach
The company’s portfolio includes thermocouples, resistance temperature detectors, infrared pyrometers, online thermal imagers, and furnace monitoring cameras, alongside its electrical heating and specialised cable lines. Tempsens exports to more than 80 countries and operates through 15 manufacturing units globally, supported by a distribution network of 28 partners. As of March 31, 2026, the company employed 731 permanent staff along with 223 contract employees.
Business Model
Tempsens follows a dual revenue model, combining Project and OEM orders, which give it entry into high-barrier, approval-intensive industrial projects, with maintenance, repair and operations, or MRO, revenue that offers more predictable, annuity-like cash flows tied to routine replacement cycles. This mix is often viewed favourably by analysts, since it balances one-time project wins with recurring demand.
Tempsens Instruments IPO Financials and Valuation
At the upper price band, Tempsens Instruments carries a market capitalisation of approximately ₹2,514.98 crore. The IPO valuation works out to a P/E ratio of 35.38 times, with an EPS of ₹8.48 and a return on net worth of 13.55 percent. The price to book ratio stands at 4.87.
The ₹650 crore issue comprises a relatively modest ₹95 crore fresh issue and a much larger ₹555 crore offer for sale, meaning the bulk of the proceeds go to selling shareholders rather than the company itself. Of the fresh issue proceeds, ₹18.13 crore is earmarked for capital expenditure toward electrical heating and specialised cable solutions, while ₹55 crore is set aside for prepayment or repayment of existing borrowings. Following the IPO, promoter holding is expected to decline from 80.51 percent to 65.67 percent.
Should You Apply: Strengths and Risks
Strengths
Tempsens holds a genuine niche leadership position in a specialised industrial segment with high barriers to entry, given the certification and approval requirements typical of temperature sensing equipment used in process industries. Its export footprint across 80-plus countries and its blended Project-OEM and MRO revenue model give it a level of demand diversification that many smaller industrial manufacturers lack.
Risks
The IPO’s heavy OFS weighting, at ₹555 crore against just ₹95 crore of fresh capital, means shareholders should note that most proceeds are not going toward business expansion. The stock’s valuation, at a P/E of over 35 times, is also on the higher side for an industrial manufacturer, which can leave less room for error if growth expectations are not met. As with any high-GMP IPO, investors should be cautious about entering purely on grey market momentum rather than the underlying business case. Our guide to stocks and equity investing covers the basics of evaluating a company’s valuation multiples before you commit funds.
How to Apply for Tempsens Instruments IPO
Since the IPO closes for subscription today, August 24, 2026, investors have only a short window left to apply through their broker’s app or net banking IPO facility using ASBA, or via UPI-based bidding depending on the platform. The minimum application is one lot of 50 shares, requiring ₹15,000 at the upper price band.
What Happens After Allotment: Key Dates to Track
Allotment is expected to be finalised on August 25, 2026. Investors who do not receive shares will see their blocked ASBA amount released shortly after, while successful applicants will see shares credited to their demat account ahead of the tentative listing date of August 28, 2026 on both the BSE and NSE.
If your listing day turns out profitable, it is worth planning for the tax impact in advance. Gains from shares sold within a year of listing are taxed differently from long-term holdings, and our capital gains tax guide explains the applicable rates, alongside a capital gains calculator to estimate your liability before you decide whether to book profits on listing day or hold longer.
Why a 100 Percent GMP Still Needs a Reality Check
A GMP indicating a doubling of your investment is eye-catching, but grey market premium remains an informal, unregulated figure traded among a limited group of participants outside any exchange mechanism. Strong GMP readings have reversed sharply before listing in past IPOs, particularly when overall market sentiment shifts in the days between issue closing and actual listing. Treat this figure as one data point among several, alongside subscription numbers and the company’s underlying fundamentals covered above, rather than a guaranteed outcome. For a broader view of how new listings fit into a long-term portfolio, our investment guide is a useful starting point.
Frequently Asked Questions
What is the Tempsens Instruments IPO GMP today?
As of August 24, 2026, the final day of bidding, the Tempsens Instruments IPO GMP stands at ₹300 per share, indicating an estimated listing premium of around 100 percent over the upper price band of ₹300.
What is the price band and lot size for Tempsens Instruments IPO?
The price band is ₹285 to ₹300 per share, with a lot size of 50 shares. At the upper price band, the minimum retail investment required is ₹15,000 for one lot.
When is the Tempsens Instruments IPO allotment and listing date?
Allotment is expected to be finalised on August 25, 2026, with shares tentatively scheduled to list on both the BSE and NSE on August 28, 2026.
What does Tempsens Instruments manufacture?
Tempsens Instruments manufactures temperature sensing solutions, electrical heating systems, and specialised cables for industrial process industries, holding an estimated 10.5 percent share of India’s temperature sensor market and exporting to more than 80 countries.
Is a 100 percent GMP a reliable indicator of actual listing gains?
No. GMP is an unofficial, unregulated grey market figure that can change sharply right up until listing day. While a high GMP suggests strong current demand, it is not a guarantee, and actual listing performance depends on broader market conditions and final subscription levels.
