7 Best Temperature Data Loggers for Food Businesses (2026)

What is a temperature data logger?

A temperature data logger is a small electronic device with a built-in sensor that records temperature readings at set intervals. You programme the interval (every 1, 5, 10, or 15 minutes), place the logger in your fridge or freezer, and it captures readings around the clock.

There are three main types. USB loggers store data on the device and you plug them into a computer to download. Bluetooth loggers sync with your phone app when you walk within range. WiFi loggers transmit readings to a cloud dashboard in real time and send alerts when temperatures drift.

For food businesses, a temperature data logger replaces the clipboard on the fridge door. Instead of someone writing a number twice a day, you get continuous records with timestamps that hold up during audits. The Food Standards Agency recommends automated monitoring wherever possible, and a data logger is the simplest way to start. For the full UK legal requirements around temperature monitoring, see our compliance guide.

1. Elitech RC-5+: best budget temperature data logger

Price: Around £18 per unit.

Connection: USB (plug into PC for PDF report).

Best for: Small food businesses, transit monitoring, single-fridge operations.

The Elitech RC-5+ is the cheapest reusable temperature data logger worth buying. It records 32,000 readings across a range of -30°C to +70°C. Accuracy sits at ±0.5°C, which is good enough for fridge and freezer monitoring. The IP65 waterproof rating means it survives condensation inside a cold room.

Setup takes two minutes. Install the free Elitech software on your PC, plug in the logger via USB, set your recording interval and alarm thresholds, and place it in your fridge. When you need the data, plug it back in. The logger generates a PDF report automatically with timestamps, min/max readings, and any alarm events.

The CR2032 battery lasts about two years. You can buy these in bulk for transit monitoring. Many food distributors tape an RC-5+ inside each delivery box to prove the cold chain stayed intact from warehouse to customer.

The downside: USB only. You must physically retrieve the logger and plug it into a computer. There are no real-time alerts. If your freezer fails at 2am, you will not know until someone checks the logger the next morning. For overnight protection, you need a WiFi or Bluetooth option with alerts.

Verdict: Best temperature data logger if you need cheap, reliable records and do not mind checking manually. Buy five for the price of one WiFi logger.

2. LogTag UTRID-16: best temperature data logger for transit

Price: Around £25 per unit.

Connection: USB (plug into PC for download via LogTag Analyzer).

Best for: Food distributors, cold chain transit, delivery verification.

LogTag is the brand you see inside pharmaceutical shipments and food delivery boxes. The UTRID-16 records 16,129 readings with a range of -30°C to +60°C. Accuracy is ±0.5°C. The device is compact (about the size of a USB stick) and weighs just 15 grams.

The free LogTag Analyzer software generates compliance reports with charts, statistics, and alarm summaries. You can set high and low alarm thresholds before deployment. The software marks any excursion in red so you spot problems immediately.

LogTag loggers carry a strong reputation in the food and pharma industries. They meet EN 12830 standards for temperature recording in transport, storage, and distribution of chilled and frozen food. If your supplier or auditor asks for EN 12830 compliance, LogTag delivers it.

The downside: same as the Elitech. USB only, no wireless alerts. You must collect the logger and plug it in to get your data. For fixed cold rooms, a WiFi logger with real-time alerts is a better choice. LogTag works best when you need a record of a specific journey or delivery.

Verdict: Best temperature data logger for proving cold chain compliance during transit. The EN 12830 certification makes it audit-ready out of the box.

3. SensorPush HT1: best Bluetooth temperature data logger

Price: Around £50 (sensor only). WiFi Gateway (G1) sold separately for around £100.

Connection: Bluetooth to phone app. Optional WiFi via G1 Gateway.

Best for: Small restaurants, home kitchens, single-site cafes, cheese rooms, wine storage.

The SensorPush HT1 measures temperature and humidity every minute and stores 20 days of data on the device. Walk within Bluetooth range (about 100 metres line of sight) and the free app syncs automatically. You get charts, alerts, and CSV exports on your phone.

Add the G1 WiFi Gateway and the SensorPush HT1 becomes a full remote monitoring system. Readings upload to the SensorPush cloud every minute. You get push notifications, email alerts, and the ability to check your fridge from anywhere. The gateway supports unlimited sensors.

The app is genuinely good. It shows min, max, and average readings for any time period. You can set alert thresholds and receive push notifications when temperatures drift. The dashboard works on iOS, Android, and web.

The downside: without the G1 Gateway, you only get data when you are physically near the sensor. The Bluetooth range drops inside a commercial kitchen with metal walls and equipment. And the sensor is not IP-rated for direct water exposure. Place it where condensation will not pool on it.

Verdict: Best Bluetooth temperature data logger for small operations. The app is better than most enterprise platforms. Add the gateway for remote alerts.

4. Lascar EL-WiFi-T: best WiFi temperature data logger with no subscription

Price: Around £130 per unit.

Connection: WiFi (802.11b). Free EasyLog Cloud software.

Best for: Restaurants, care homes, and pharmacies that want WiFi logging without monthly fees.

Lascar is a UK manufacturer based in Salisbury. The EL-WiFi-T connects directly to your WiFi network and streams readings to the free EasyLog Cloud platform. No gateway needed. No subscription. The logger holds up to 1 million readings internally if WiFi drops, then syncs when the connection restores.

The EasyLog Cloud dashboard shows live readings, historical charts, and alarm events. You can set email alerts for temperature breaches. Reports export as PDF or CSV for auditors and EHO inspectors.

The internal sensor covers -20°C to +60°C with ±1.0°C accuracy. For fridges and ambient storage, that accuracy is fine. For freezers below -20°C, you need the EL-WiFi-TC model with an external thermocouple probe (around £170).

The downside: the ±1.0°C accuracy is the widest on this list. For pharmaceutical or high-precision food manufacturing, you want tighter accuracy. The WiFi module uses 802.11b, which is older and slower than modern standards. And the IP55 rating means splash-proof but not submersible.

Verdict: Best value WiFi temperature data logger with zero recurring costs. A UK-made product with free cloud software. Hard to beat for the price.

5. ThermoWorks ThermaData WiFi: best accuracy for food compliance

Price: Around £140 per unit (ambient model). Probe models from £160.

Connection: WiFi. Cloud dashboard with email and SMS alerts.

Best for: Food manufacturers, BRCGS-audited sites, pharmaceutical storage, care homes.

ThermoWorks builds professional thermometers used by chefs, food scientists, and compliance teams worldwide. The ThermaData WiFi logger delivers ±0.2°C accuracy, which is the tightest on this list. Every unit ships with a NIST-traceable calibration certificate.

The logger stores 18,000 readings locally and streams to the ThermoWorks cloud over WiFi. Set your logging interval from 1 second to 12 hours. Alarm limits trigger email and SMS alerts so you know the moment a fridge drifts. The cloud dashboard shows live data across all your loggers from one screen.

Battery life runs about one year on two AA batteries. Models are available for ambient temperature, external thermistor probes, and thermocouple probes for deep-freeze environments down to -200°C. The probe models let you measure product core temperature, not just air temperature.

The downside: the cloud platform is functional but basic compared to SensorPush or Comark. Multi-site management requires some manual setup. And at £140+ per unit, deploying across 20 cold rooms gets expensive fast.

Verdict: Best temperature data logger if accuracy and calibration traceability are your top priorities. The ±0.2°C spec and NIST certificate satisfy BRCGS and pharmaceutical auditors.

6. Comark Diligence RF311: best WiFi temperature data logger for multi-site

Price: Around £160 per unit. Comark Cloud subscription required for full features.

Connection: WiFi (802.11 b/g/n). Comark Cloud platform.

Best for: Multi-site restaurant groups, hospital kitchens, contract caterers, care home chains.

Comark has made food thermometers for over 50 years. The Diligence RF311 WiFi logger supports WPA2 and enterprise WiFi networks, which matters if your IT team controls network access. Accuracy is ±0.2°C across -15°C to +80°C.

The Comark Cloud platform is where this logger shines for multi-site operations. You manage all loggers from one dashboard. Automated HACCP reports generate on schedule. Email notifications fire when temperatures breach your limits. The audit trail tracks every reading, alarm, and user action.

Comark also offers glycol simulant models for pharmaceutical fridges and dual-channel models with two thermocouple probes. The range covers everything from a single restaurant fridge to a 50-site care home chain.

The downside: the Comark Cloud subscription adds ongoing cost on top of the hardware. Pricing is not published, so you need to request a quote. Setup is more complex than consumer-grade loggers like SensorPush. You may need IT support to configure enterprise WiFi credentials.

Verdict: Best WiFi temperature data logger for businesses managing multiple sites. The HACCP reporting and enterprise WiFi support set it apart from simpler options.

7. Signatrol SL54: best UK-made temperature data logger for cold chain

Price: Around £80 per unit. Software licence may apply for multi-user setups.

Connection: USB with optional wireless gateway. TempIT Pro software.

Best for: UK food manufacturers, cold chain warehouses, distribution centres.

Signatrol is a Tewkesbury-based UK manufacturer that has built temperature data loggers for over 30 years. The SL54 is their workhorse model for food and beverage. It records up to 1 million readings across -40°C to +85°C with ±0.1°C accuracy at 25°C.

The IP67 waterproof rating is the highest on this list. You can place an SL54 inside a wash-down environment, a blast chiller, or a wet cold room without worry. The stainless steel casing survives drops and rough handling in warehouse environments.

Signatrol's TempIT Pro software generates EN 12830 compliant reports. You get charts, statistics, alarm analysis, and certificate traceability. For businesses that need to prove cold chain compliance to supermarket auditors or BRCGS assessors, the SL54 produces the paperwork they expect.

The downside: USB-based data retrieval by default. You need the optional wireless gateway for remote access. The software interface feels dated compared to cloud-native platforms. And at £80 per unit, it sits in the mid-range. For simple fridge monitoring, an Elitech at £18 does the same basic job.

Verdict: Best UK-made temperature data logger for serious cold chain operations. The IP67 rating, ±0.1°C accuracy, and EN 12830 compliance justify the price.

Temperature data logger comparison table

Here is how all seven temperature data loggers compare on the features that matter most for food businesses.

Key takeaway: If budget is your priority, buy the Elitech RC-5+ in bulk. If you want wireless alerts without subscriptions, pick the Lascar EL-WiFi-T. If accuracy matters most, the ThermoWorks ThermaData or Signatrol SL54 lead the field. For multi-site HACCP reporting, the Comark Diligence is the strongest option.

USB vs Bluetooth vs WiFi: which temperature data logger type do you need?

USB loggers (£15 to £80) are the cheapest option. You place them in a fridge, leave them running, and plug them into a computer when you need the data. They work well for transit monitoring and basic compliance records. The problem: no real-time alerts. If your freezer fails overnight, a USB logger will not tell you until morning.

Bluetooth loggers (£40 to £100) sync with your phone when you walk within range. You get alerts and charts on a free app. They work well for single-site operations where someone visits the kitchen daily. The limitation: Bluetooth range drops through walls and metal shelving. You need to be physically close to get updates.

WiFi loggers (£100 to £200+) stream readings to a cloud dashboard 24/7. You get real-time alerts by email, SMS, or push notification from anywhere. They are the best choice for overnight monitoring and multi-site management. The tradeoff: higher upfront cost and some platforms charge monthly subscriptions.

For most food businesses, start with one or two WiFi loggers in your most critical cold rooms. Use USB loggers for transit and secondary storage. The combination gives you continuous protection where it matters and affordable coverage everywhere else. For a full comparison of wireless temperature and humidity sensors, see our dedicated guide.

What to look for in a temperature data logger for food

Accuracy: ±0.5°C is acceptable for most food storage. BRCGS and pharmaceutical audits often require ±0.2°C or better. Check the spec sheet, not the marketing copy.

Calibration: Your data logger is only as trustworthy as its last calibration. Look for UKAS-traceable or NIST-traceable calibration certificates. Some manufacturers include a certificate with every unit. Others charge extra. Budget for annual recalibration. The same principle applies to handheld food temperature probes: calibrate everything that takes a reading.

Waterproof rating: Cold rooms create condensation. Freezers create ice. Your logger needs at least IP65 to survive. IP67 means it can handle brief submersion. Anything below IP55 should stay outside the cold room in a dry area.

Storage capacity: A logger recording every 5 minutes generates 288 readings per day. At that rate, a 32,000-point logger fills up in about 111 days. A 1-million-point logger lasts over 9 years. More capacity means fewer downloads and less risk of data loss.

Alert capability: USB loggers have no alerts. Bluetooth loggers alert your phone when in range. WiFi loggers alert you anywhere. For food businesses that need to react quickly to temperature excursions, WiFi alerts are worth the extra cost.