Nor1209 1/2" Microphone Preamplifier
Standard preamplifier for 1/2" measurement microphones.
Overview
The Nor1209 is a standard 1/2" microphone preamplifier designed for applications requiring a separate, externally mounted preamplifier connected to the sound level meter or analyser via extension cable. Unlike insert-type preamplifiers that mount directly into the instrument body, the Nor1209 connects via a standard LEMO 7-pin cable, enabling flexible positioning of the microphone at a distance fr…
Key Features
- External mounting with LEMO 7-pin cable connection
- Ultra-low self-noise < 2.5 µV for high-sensitivity measurements
- High input impedance > 10 GΩ preserves microphone sensitivity
- Supports cable lengths up to 100 metres for remote installations
- 200 V polarization voltage for externally polarized microphones
- Compatible with all Norsonic 1/2" condenser microphones
- Robust construction for permanent outdoor installations
- Ideal companion for Nor1545 noise monitoring terminal
Applications
- Permanent noise monitoring stations with remote microphone mounting
- Airport noise monitoring systems with mast-mounted microphones
- Construction site perimeter noise monitoring
- Environmental monitoring with microphone at regulatory height
- Industrial facility boundary noise monitoring
- Long-cable installations where analyser is housed remotely
Technical Specifications
- Input: 1/2" microphone
- Noise: < 2.5 µV
- Output: LEMO 7-pin
Frequently Asked Questions
- What type of preamplifier is this?
The Nor1209 is a standard external preamplifier that connects to the analyser via a LEMO 7-pin extension cable, unlike insert-type preamplifiers that mount directly into the instrument body. This design enables flexible microphone positioning at distances up to 100 metres from the analyser. - What is the difference between the Nor1209 and Nor1203?
Both preamplifiers offer equivalent acoustic performance with < 2.5 µV noise and > 10 GΩ input impedance. The Nor1203 is an insert-type that mounts directly into the sound level meter body, while the Nor1209 is an external type connected via cable for remote microphone installations where the microphone must be separated from the analyser. - Can the Nor1209 be used for permanent outdoor installations?
Yes, the Nor1209 is commonly used in permanent outdoor noise monitoring stations where the microphone and preamplifier are mounted on a mast at measurement height, connected via extension cable to the analyser housed in a weather-protected enclosure. When paired with outdoor microphone accessories, it provides reliable long-term monitoring capability.
Application Guide
The Nor1209 1/2" Microphone Preamplifier belongs to the Norsonic Microphones range. See the Microphones application guide for system configuration, compatible accessories, and applicable measurement standards.
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Why Norsonic?
- Manufactured in Norway — decades of acoustic measurement heritage; all instruments designed and built in Norsonic AS, Lierskogen, Norway
- IEC 61672 Class 1 — highest accuracy class for professional and regulatory acoustic measurement
- International type approvals — PTB (Germany) and LNE (France); accepted by environmental authorities across the region
- 3-year manufacturer warranty — covers parts and labour; Norsonic Asia authorized service center support throughout the region
- Open data formats — .nox files work with NorReview and can be exported to CSV, Excel, and third-party analysis software
Calibration and Compliance
- All Norsonic instruments require periodic IEC 61672-3 calibration — Norsonic Asia provides factory-authorized calibration services with full DANAK-traceable certificates
- Calibration interval: 1 year for ISO 17025 accredited laboratories; 2 years for field instruments in non-accredited applications
- Field calibration check: use an IEC 60942 Class 1 sound calibrator (94 dB or 114 dB) before and after each measurement session
- Loaner instruments available during calibration to minimize project downtime — contact Norsonic Asia for loaner availability
Availability & Regional Support
Available from Norsonic Asia — the factory-authorized distributor for ASEAN, GCC, and South Asia. Instrument supply includes 3-year manufacturer warranty, factory-authorized calibration services, operator training, and after-sales technical support.
- Typical lead time: 3–6 weeks from order confirmation (ex-factory Norway)
- Countries served: Singapore, Malaysia, Thailand, Vietnam, Philippines, Indonesia, UAE, Saudi Arabia, Qatar, Kuwait, India, Bangladesh, Sri Lanka, and more
- Technical support: English and Arabic; response within 1 business day
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