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Ace Instruments

High-Accuracy Wall-Mounted HVAC Temperature & Humidity Sensor – Smart Building Automation Climate Monitor for Industrial & Commercial Use

High-Accuracy Wall-Mounted HVAC Temperature & Humidity Sensor – Smart Building Automation Climate Monitor for Industrial & Commercial Use

Regular price $345.78
Regular price $382.00 Sale price $345.78
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Features: Temperature Range: -22°F to 95°F (-35°C to 35°C) with 4 to 20mA output Humidity Range: 0 to 100% RH with 4 to 20mA output LCD Display with 50/60Hz operation at 24V AC Fast response times: Humidity under 20 seconds, Temperature under 8.5 minutes IP65/IP40 protection rating Removable, replaceable sensing element Part Number: Siemens QFA3171D-P-2 The QFA3171D is a wall-mounted sensor designed for HVAC systems, ventilation plants, and building automation where precise humidity and temperature monitoring is essential. High accuracy combined with rapid response times makes it ideal for commercial and industrial climate control applications. Features dual signal outputs and an easy-to-read LCD display for real-time monitoring.
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See what effortless living feels like

★★★★★

The thermostat connected to our Wi-Fi on the first try, and the app has been easy to use. I especially like adjusting the temperature before we get home from work. It has become part of our routine without feeling complicated.

Rachel D.

Rachel D.

Denver, CO

★★★★★

I installed two smart plugs for lamps and a coffee maker. Scheduling them took only a few minutes, and they have stayed connected consistently. It is a simple upgrade, but it makes the mornings noticeably easier.

Marcus L.

Marcus L.

Charlotte, NC

★★★★★

The leak sensors were smaller than I expected and easy to place under the kitchen sink and near the water heater. We received an alert when a fitting started dripping, which gave us time to handle it before it became a larger problem.

Emily S.

Emily S.

Portland, OR

★★★★★

We added smart light strips behind the television and under the cabinets. The colors are smooth, the brightness range is useful, and voice control works well with our existing setup. The rooms feel more polished without requiring a complicated installation.

Brandon K.

Brandon K.

Tampa, FL

★★★★★

I was looking for one place to manage our lights, temperature sensors, and door alerts. After setting up the hub, everything became much easier to organize. The automations run reliably, and my family can still use the devices normally.

Natalie P.

Natalie P.

Madison, WI

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Smartivo brings security, lighting, climate, and automation together through carefully selected technology designed to make everyday living simpler, more comfortable, and beautifully connected.
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