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Context Plus Heat Detector 135°F Series 65A Flame Retardant Emergency Alarm With Flashing LED

PKR 3500.00
Specifications:

- Materials: Polycarbonate

- Dimensions: 3.93 in. dia. x 1.65 in. height

- Weight: 2.80 oz

- Attributes: White flame-retardant

- Terminals: Nickel plated stainless steel

- Price mentioned per piece.

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Description

The 55000-139IMC from the Context Plus Series 65A is a conventional dual-mode heat detector (fixed-temperature + rate-of-rise) rated at 135 °F (approximately 57 °C). It is UL Listed and includes a flashing LED indicator to show normal standby status and alarm state. The detector is intended for use in environments where smoke detectors are unsuitable (e.g. dusty, smoky, humid areas).

It uses a pair of matched thermistors (dual thermistor network) to monitor ambient temperature and rate of temperature increase, combining both signals to decide when to alarm.

Key Features 

  • Dual sensing (Fixed + Rate-of-Rise) — triggers if temperature rises rapidly or if fixed threshold of 135 °F is exceeded

  • Flashing LED indicator — visible status signaling: flashes in standby, red solid in alarm

  • Wide supply voltage — operates over 9 V to 33 V DC, accommodating a wide range of conventional fire circuits

  • Low quiescent current — minimal current draw in standby (around 50 µA) to preserve power on wiring loops

  • Alarm current — ~ 52 mA at 24 V when in alarm condition

  • Ambient rating — 32 °F to 100 °F (0 °C to ~38 °C) typical for detection zones

  • Remote output — supports a remote LED indicator (sink current up to ~17 mA)

  • Insensitive to wind / pressure changes — stable operation under airflow, making it reliable in variable HVAC environments

  • Standard mounting base compatibility — fits into typical Series 65A bases (e.g. 45681-200IMC)

  • Robust design — flame-retardant polycarbonate housing, nickel-plated terminals

Industrial Uses / Applications

  • Mechanical / boiler rooms, engine rooms

  • Kitchens, utility rooms with dust, grease, or cooking vapours

  • Warehouses or storage with minimal smoke risk but heat generation

  • Utility corridors, areas where smoke detectors may produce false alarms

  • Environments with poor visibility or particulate matter

Products specifications
Device TypeHeat Detector
Heat Detector TypeRate-of-Rise

Payment Guide

Thank you for Shopping with us!

 For your information, there are 2 options for your order's payment as below.

1st Option: Bank Transfer or ATM Cash Deposit

You may transfer the total order amount using Online bank transfer from any of your PAKISTANI Bank Online Portal. Our Bank Account details as below:

Bank Name: BANK AL HABIB

IBAN: PK27 BAHL 1014 0981 0098 9501

Account No: 10140981009895016
Account Name: MJS TRADERS

Please send an email to sales@mjstraders.com  with the payment reference number or confirmation, once the amount has been transferred.

 

2nd Option: Pay by Credit/Debit Card

You can use our secured payment gateway offered by PAYFAST to pay through Credit or Debit card.

After Selecting "Credit/Debit card payment via PAYFAST" during checkout process in payment method, you will be directed to Payfast Site to complete the order. For additional security reasons, only 3D Secured Debit or Credit cards will be accepted. To check if your Card is 3D Secured, Please contact your bank.

Once the transaction is successful, there is no need to contact us. Your payment status for the order will be update in real time.


Get in touch with us to let us know your requirements. We'll be happy to answer any queries you may have.

NO HASSLE RETURNS
_____________________________________________________________________________________________________________________________________________________

 At MJS Traders we believe in making returns hassle free. As longs as the below conditions are met, we will happily take back, at no charge, any product you may be unsatisfied with. Simply lodge a return request from your portal or contact our customer service department to arrange a return.

  • Returns must be accompanied by a copy of the original invoice, stating the reason for the return
  • All returns must arrive in original packaging, unopened and unmarked.
  • Returns will be accepted within 15 days of receiving the product. Any Returns over 15 days are subject to a restocking fee
  • Returns on products bought on promotion or through any discount coupon are not accepted unless the product has manufacturing defect.
  • Shortages or errors must be reported within 7 days of the receipt of the package.
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