Thermo Scientific Model 81i Mercury Calibrator – Precision Gas Standard Generator
🔗 Explore Product Range
🔗 View Detailed Specs
⚙️ Product Overview
The Thermo Scientific Model 81i Hg Calibrator (part number 81I‑ANNNAB) with Electron module 102664‑00 (Fisher) is a high‑precision device for generating mercury vapor standards. It is built for lab and field use where accurate mercury calibration is needed. The unit uses a metal vapor permeation technique to produce a stable concentration of mercury in carrier gas. It works with common carrier gases such as nitrogen or air. The front panel has a flow controller, pressure gauge, and digital display. The display shows actual concentration, temperature, and flow rate in real time. The calibrator operates over a wide flow range from 0.1 to 2.0 L/min. It delivers mercury concentrations from 1 ng/m³ up to 100 µg/m³, depending on permeation device and operating temperature. The enclosed permeation oven holds the mercury source at a constant temperature to maintain steady output. All wetted parts are made of inert materials to prevent contamination or drift over time.
💡 Technical Features and Performance
The Model 81i has an internal microprocessor that controls oven temperature to within ±0.01 °C. This tight control ensures that the permeation rate remains constant for long calibration runs. The unit includes a built‑in pressure regulator and flow meter that work together to keep carrier gas flow within 1 % of setpoint. The sample output port has quick‑connect fittings for fast setup. The digital interface offers both analog (0–5 V or 4–20 mA) and RS‑232 outputs for logging concentration and status. The calibrator can store up to five calibration sequences in memory. Each sequence can run for up to 100 hours without user intervention. The instrument self‑checks temperature, flow, and internal electronics at startup. It flags any error with a red LED and shows an error code on the screen. The housing is built from anodized aluminum and stainless steel, making it durable for lab benches or mobile labs. The overall size is compact: 250 × 150 × 300 mm, with a weight of 5 kg. Power options include 100–240 VAC at 50/60 Hz or 24 V DC for field use.
🔌 Operating Parameters
- Carrier Gas: Nitrogen, zero‑air, or dry air
- Flow Range: 0.1–2.0 L/min
- Concentration Range: 1 ng/m³–100 µg/m³
- Oven Temp. Control: 60–80 °C ±0.01 °C
- Power Supply: 100–240 VAC, 50/60 Hz or 24 V DC
- Analog Outputs: 0–5 V, 4–20 mA
- Digital Interface: RS‑232
- Dimensions: 250 × 150 × 300 mm
- Weight: 5 kg
📈 Industrial News & Trends
In recent months, environmental monitoring labs have seen increased demand for mercury analyzers and calibrators. Stricter regulations on mercury emissions have driven companies to upgrade their calibration equipment. Thermo Scientific’s Model 81i is now used in power plants and waste incinerators to validate continuous mercury monitors. Users report that fast warm‑up time (under 10 minutes) and stable output cut calibration time by half. Many labs now integrate the calibrator with automated sampling systems for around‑the‑clock verification. Industry analysts note a shift toward portable calibrators that can be taken on site for compliance checks. This trend is likely to continue as more regions adopt tighter mercury emission limits.
📋 Recommended Similar Models
| Model | Description | Carrier Gas | Flow Range | Key Feature |
|---|---|---|---|---|
| Thermo 81i-XYZAB | High‑range Hg Calibrator, extended range | Nitrogen | 0.1–5.0 L/min | Up to 200 µg/m³ output |
| Thermo 82i Mercury | Dual‑channel Hg generator | Nitrogen/Air | 0.05–1.0 L/min | Dual outputs, two ovens |
| Fisher 101264-00 | Portable Hg permeation standard | Zero‑air | 0.1–0.5 L/min | Hand‑carried design |
| Environics 3010 | Trace gas generator for calibration labs | Custom gases | 0.01–2.0 L/min | Multi‑gas option |
| Vici Valco 950 | On‑line gas standard generator | Nitrogen | 0.5–3.0 L/min | PLC control, touchscreen UI |
Zhangzhou Fengyun Electric Equipment Co., Ltd.
Zhangzhou Fengyun Electric Equipment Co., Ltd. is a leading supplier of industrial control and analytical instruments. The company has strong technical expertise and years of experience in import‑export trade. It offers a wide range of products from top European and American brands. Main products include gas calibrators, PLC modules, power supplies, and motion controllers. The company serves clients in environmental monitoring, petrochemical, power generation, and manufacturing sectors.
Contact Sales Engineer: Amy
📞 15359029662
📧 geabbamy@gmail.com
